U.S. patent application number 17/451767 was filed with the patent office on 2022-04-28 for techniques for measurement reporting and transmit power allocation in power-constrained environment.
The applicant listed for this patent is QUALCOMM Incorporated. Invention is credited to Brian Clarke BANISTER, Raghu Narayan CHALLA, Ramesh Chandra CHIRALA, Troy CURTISS, Lin LU, Arvind Vardarajan SANTHANAM, Bhupesh Manoharlal UMATT.
Application Number | 20220132377 17/451767 |
Document ID | / |
Family ID | |
Filed Date | 2022-04-28 |
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United States Patent
Application |
20220132377 |
Kind Code |
A1 |
SANTHANAM; Arvind Vardarajan ;
et al. |
April 28, 2022 |
TECHNIQUES FOR MEASUREMENT REPORTING AND TRANSMIT POWER ALLOCATION
IN POWER-CONSTRAINED ENVIRONMENT
Abstract
Various aspects of the present disclosure generally relate to
wireless communication. In some aspects, a user equipment (UE) may
identify, while camped on a first cell associated with a first
radio access technology (RAT), a power management level for a
communication using a second RAT, wherein the power management
level indicates an available power for the communication using the
second RAT, and wherein the available power is based at least in
part on an exposure rate or an absorption rate. The UE may delay a
transmission of a measurement report on the first cell based at
least in part on the identification of the power management level.
Numerous other aspects are provided.
Inventors: |
SANTHANAM; Arvind Vardarajan;
(San Diego, CA) ; CHALLA; Raghu Narayan; (San
Diego, CA) ; BANISTER; Brian Clarke; (San Diego,
CA) ; CURTISS; Troy; (Boulder, CO) ; UMATT;
Bhupesh Manoharlal; (Poway, CA) ; CHIRALA; Ramesh
Chandra; (San Diego, CA) ; LU; Lin; (San
Diego, CA) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
QUALCOMM Incorporated |
San Diego |
CA |
US |
|
|
Appl. No.: |
17/451767 |
Filed: |
October 21, 2021 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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63198488 |
Oct 22, 2020 |
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International
Class: |
H04W 36/00 20060101
H04W036/00; H04W 52/34 20060101 H04W052/34 |
Claims
1. An apparatus for wireless communication at a user equipment
(UE), comprising: a memory; and one or more processors, coupled to
the memory, configured to: identify, while camped on a first cell
associated with a first radio access technology (RAT), a power
management level for a communication using a second RAT, wherein
the power management level indicates an available power for the
communication using the second RAT, and wherein the available power
is based at least in part on an exposure rate or an absorption
rate; and delay a transmission of a measurement report on the first
cell based at least in part on the identification of the power
management level.
2. The apparatus of claim 1, wherein the power management level
fails to satisfy a threshold, and wherein the transmission is
delayed based at least in part on the power management level
failing to satisfy the threshold.
3. The apparatus of claim 2, wherein the threshold is associated
with a communication type of the communication using the second
RAT.
4. The apparatus of claim 2, wherein the threshold is associated
with maintaining a minimum target data rate associated with the
second RAT.
5. The apparatus of claim 1, wherein the communication using the
second RAT is a random access channel (RACH) communication.
6. The apparatus of claim 1, wherein the communication using the
second RAT is associated with an uplink shared channel or an uplink
control channel.
7. The apparatus of claim 1, wherein the available power is a
residual available power remaining after power has been allocated
from a full compliance power budget for a communication using the
first RAT.
8. The apparatus of claim 1, wherein the one or more processors are
further configured to: determine that a threshold associated with
the power management level is satisfied; and resume transmission of
the measurement report based at least in part on the threshold
being satisfied.
9. The apparatus of claim 1, wherein the one or more processors are
further configured to: determine that the measurement report is
associated with a particular frequency, wherein the power
management level is based at least in part on the measurement
report being associated with the particular frequency.
10. The apparatus of claim 9, wherein the identification of the
power management level is based at least in part on whether the
particular frequency associated with the measurement report is
associated with a dual-connectivity cell addition or a handover or
redirection to a standalone cell.
11. The apparatus of claim 10, wherein the one or more processors
are further configured to: determine whether the particular
frequency is associated with the dual-connectivity cell addition or
the handover or redirection to the standalone cell based at least
in part on the particular frequency being in a frequency range that
the UE does not support for a primary cell.
12. The apparatus of claim 11, wherein the frequency range is a
millimeter wave frequency range.
13. The apparatus of claim 10, wherein the one or more processors
are further configured to: determine whether the particular
frequency is associated with the dual-connectivity cell addition or
the handover or redirection to the standalone cell based at least
in part on whether the measurement report is associated with a
location where a standalone mode associated with the second RAT is
not deployed.
14. The apparatus of claim 10, wherein the one or more processors
are further configured to: determine whether the particular
frequency is associated with the dual-connectivity cell addition or
the handover or redirection to the standalone cell based at least
in part on whether the UE has received information indicating that
the particular frequency can be used for a standalone cell or a
secondary cell group.
15. The apparatus of claim 1, wherein the transmission of the
measurement report is delayed with regard to a frequency for which
the power management level is identified.
16. The apparatus of claim 15, wherein measurement reporting is not
delayed with regard to a frequency for which the power management
level is not identified.
17. The apparatus of claim 1, wherein the one or more processors
are further configured to: reject a blind secondary cell group
addition associated with a cell based at least in part on the power
management level being identified for the cell.
18. The apparatus of claim 1, wherein the power management level is
associated with a handover of the UE to the second RAT, and wherein
the measurement report is associated with a measurement configured
on a frequency associated with the second RAT.
19. The apparatus of claim 1, wherein the power management level is
based at least in part on historical information associated with a
cell.
20. The apparatus of claim 1, wherein the power management level is
based at least in part on motion information determined by the
UE.
21. The apparatus of claim 1, wherein the one or more processors
are further configured to: transmit information indicating whether
the UE supports the second RAT.
22. An apparatus for wireless communication at an UE, comprising: a
memory; and one or more processors, coupled to the memory,
configured to: identify, while connected to a first cell associated
with a first radio access technology (RAT), a second cell,
associated with a second RAT, for dual-connectivity communication
or a handover; identify a power management level for the second
cell, wherein the power management level is based at least in part
on a compliance power budget of the UE; and allocate, prior to
adding the second cell, a power for the second cell based at least
in part on the identified power management level.
23. The apparatus of claim 22, wherein the power management level
is based at least in part on a determination that decreasing power
allocated for the first RAT will not cause radio link failure on
the first cell.
24. The apparatus of claim 22, wherein the power management level
is based at least in part on a determination that a measurement on
the second cell is within a threshold of a measurement reporting
criterion, or that the measurement on the second cell satisfies the
measurement reporting criterion and a time to trigger the handover
or a cell addition has started.
25. The apparatus of claim 22, wherein the power management level
is based at least in part on a determination, before the compliance
power budget is modified, that the second cell would not have
adequate power to complete a communication.
26. A method of wireless communication performed by a user
equipment (UE), comprising: identifying, while camped on a first
cell associated with a first radio access technology (RAT), a power
management level for a communication using a second RAT, wherein
the power management level indicates an available power for the
communication using the second RAT, and wherein the available power
is based at least in part on an exposure rate or an absorption
rate; and delaying a transmission of a measurement report on the
first cell based at least in part on the identification of the
power management level.
27. The method of claim 26, wherein the power management level
fails to satisfy a threshold, and wherein the transmission is
delayed based at least in part on the power management level
failing to satisfy the threshold.
28. The method of claim 27, wherein the threshold is associated
with a communication type of the communication using the second
RAT.
29. A method of wireless communication performed by a user
equipment (UE), comprising: identifying, while connected to a first
cell associated with a first radio access technology (RAT), a
second cell, associated with a second RAT, for dual-connectivity
communication or a handover; identifying a power management level
for the second cell, wherein the power management level is based at
least in part on a compliance power budget of the UE; and
allocating, prior to adding the second cell, a power for the second
cell based at least in part on the identified power management
level.
30. The method of claim 29, wherein the power management level is
based at least in part on a determination that decreasing power
allocated for the first RAT will not cause radio link failure on
the first cell.
Description
CROSS-REFERENCE TO RELATED APPLICATION
[0001] This patent application claims priority to U.S. Provisional
Patent Application No. 63/198,488, filed on Oct. 22, 2020, entitled
"TECHNIQUES FOR MEASUREMENT REPORTING AND TRANSMIT POWER ALLOCATION
IN POWER-CONSTRAINED ENVIRONMENT," and assigned to the assignee
hereof. The disclosure of the prior application is considered part
of and is incorporated by reference into this patent
application.
FIELD OF THE DISCLOSURE
[0002] Aspects of the present disclosure generally relate to
wireless communication and to techniques and apparatuses for
measurement reporting and transmit power allocation in a
power-constrained environment.
DESCRIPTION OF RELATED ART
[0003] Wireless communication systems are widely deployed to
provide various telecommunication services such as telephony,
video, data, messaging, and broadcasts. Typical wireless
communication systems may employ multiple-access technologies
capable of supporting communication with multiple users by sharing
available system resources (e.g., bandwidth, transmit power, or the
like). Examples of such multiple-access technologies include code
division multiple access (CDMA) systems, time division multiple
access (TDMA) systems, frequency-division multiple access (FDMA)
systems, orthogonal frequency-division multiple access (OFDMA)
systems, single-carrier frequency-division multiple access
(SC-FDMA) systems, time division synchronous code division multiple
access (TD-SCDMA) systems, and Long Term Evolution (LTE).
LTE/LTE-Advanced is a set of enhancements to the Universal Mobile
Telecommunications System (UMTS) mobile standard promulgated by the
Third Generation Partnership Project (3GPP).
[0004] A wireless network may include a number of base stations
(BSs) that can support communication for a number of user equipment
(UEs). A UE may communicate with a BS via the downlink and uplink.
"Downlink" (or forward link) refers to the communication link from
the BS to the UE, and "uplink" (or reverse link) refers to the
communication link from the UE to the BS. As will be described in
more detail herein, a BS may be referred to as a Node B, a gNB, an
access point (AP), a radio head, a transmit receive point (TRP), a
New Radio (NR) BS, a 5G Node B, or the like.
[0005] The above multiple access technologies have been adopted in
various telecommunication standards to provide a common protocol
that enables different user equipment to communicate on a
municipal, national, regional, and even global level. NR, which may
also be referred to as 5G, is a set of enhancements to the LTE
mobile standard promulgated by the 3GPP. NR is designed to better
support mobile broadband Internet access by improving spectral
efficiency, lowering costs, improving services, making use of new
spectrum, and better integrating with other open standards using
orthogonal frequency division multiplexing (OFDM) with a cyclic
prefix (CP) (CP-OFDM) on the downlink (DL), using CP-OFDM and/or
SC-FDM (e.g., also known as discrete Fourier transform spread OFDM
(DFT-s-OFDM)) on the uplink (UL), as well as supporting
beamforming, multiple-input multiple-output (MIMO) antenna
technology, and carrier aggregation. As the demand for mobile
broadband access continues to increase, further improvements in
LTE, NR, and other radio access technologies remain useful. For
example, further improvements in power management remain
useful.
SUMMARY
[0006] In some aspects, a method of wireless communication
performed by a user equipment (UE) includes identifying, while
camped on a first cell associated with a first radio access
technology (RAT), a power management level for a communication
using a second RAT, wherein the power management level indicates an
available power for the communication using the second RAT, and
wherein the available power is based at least in part on an
exposure rate or an absorption rate; and delaying a transmission of
a measurement report on the first cell based at least in part on
the identification of the power management level.
[0007] In some aspects, the power management level fails to satisfy
a threshold, and the transmission is delayed based at least in part
on the power management level failing to satisfy the threshold.
[0008] In some aspects, the threshold is associated with a
communication type of the communication using the second RAT.
[0009] In some aspects, the threshold is associated with
maintaining a minimum target data rate associated with the second
RAT.
[0010] In some aspects, the communication using the second RAT is a
random access channel (RACH) communication.
[0011] In some aspects, the communication using the second RAT is
associated with an uplink shared channel or an uplink control
channel.
[0012] In some aspects, the available power is a residual available
power after power has been allocated for a communication using the
first RAT.
[0013] In some aspects, the method includes determining that a
threshold associated with the power management level is satisfied;
and resuming transmission of the measurement report based at least
in part on the threshold being satisfied.
[0014] In some aspects, the method includes determining that the
measurement report is associated with a particular frequency,
wherein the power management level is based at least in part on the
measurement report being associated with the particular
frequency.
[0015] In some aspects, the identification of the power management
level is based at least in part on whether the particular frequency
associated with the measurement report is associated with a
dual-connectivity cell addition or a handover or redirection to a
standalone cell.
[0016] In some aspects, the method includes determining whether the
particular frequency is associated with the dual-connectivity cell
addition or the handover or redirection to the standalone cell
based at least in part on the particular frequency being a
millimeter wave frequency and the UE not supporting a millimeter
wave primary cell.
[0017] In some aspects, the method includes determining whether the
particular frequency is associated with the dual-connectivity cell
addition or the handover or redirection to the standalone cell
based at least in part on the particular frequency being in a
frequency range that the UE does not support for a primary
cell.
[0018] In some aspects, the method includes determining whether the
particular frequency is associated with the dual-connectivity cell
addition or the handover or redirection to the standalone cell
based at least in part on whether the measurement report is
associated with a location where a standalone mode associated with
the second RAT is not deployed.
[0019] In some aspects, the method includes determining whether the
particular frequency is associated with the dual-connectivity cell
addition or the handover or redirection to the standalone cell
based at least in part on whether the UE has received information
indicating that the particular frequency can be used for a
standalone cell or a secondary cell group.
[0020] In some aspects, the transmission of the measurement report
is delayed with regard to a frequency for which the power
management level is identified.
[0021] In some aspects, measurement reporting is not delayed with
regard to a frequency for which the power management level is not
identified.
[0022] In some aspects, the method includes rejecting a blind
secondary cell group addition associated with a cell based at least
in part on the power management level being identified for the
cell.
[0023] In some aspects, the power management level is associated
with a handover of the UE to the second RAT, and the measurement
report is associated with a measurement configured on a frequency
associated with the second RAT.
[0024] In some aspects, the power management level is based at
least in part on historical information associated with a cell.
[0025] In some aspects, the power management level is based at
least in part on motion information determined by the UE.
[0026] In some aspects, the first RAT is a Long Term Evolution
RAT.
[0027] In some aspects, the first RAT is a New Radio RAT in a
Frequency Range 1.
[0028] In some aspects, the first RAT is a New Radio RAT in a
Frequency Range 2.
[0029] In some aspects, the second RAT is a Long Term Evolution
RAT.
[0030] In some aspects, the second RAT is a New Radio RAT in a
Frequency Range 1.
[0031] In some aspects, the second RAT is a New Radio RAT in a
Frequency Range 2.
[0032] In some aspects, the method includes transmitting
information indicating whether the UE supports the second RAT.
[0033] In some aspects, the information indicating whether the UE
supports the second RAT is transmitted as a fail reason in a
message rejecting a blind secondary cell group addition associated
with a cell.
[0034] In some aspects, a method of wireless communication
performed by a UE includes identifying, while connected to a first
cell associated with a first RAT, a second cell, associated with a
second RAT, for dual-connectivity communication or a handover;
identifying a power management level for the second cell, wherein
the power management level is based at least in part on a
compliance power budget of the UE; and allocating a power for the
second cell based at least in part on the identified power
management level.
[0035] In some aspects, the power management level is based at
least in part on a determination that decreasing power allocated
for the first RAT will not cause radio link failure on the first
cell.
[0036] In some aspects, the power management level is based at
least in part on a determination that a measurement on the second
cell is within a threshold of a measurement reporting criterion, or
that the measurement on the second cell satisfies the measurement
reporting criterion and a time to trigger the handover or a cell
addition has started.
[0037] In some aspects, the power management level is based at
least in part on a determination, before the compliance power
budget is modified, that the second cell would not have adequate
power to complete a communication.
[0038] In some aspects, the power management level is based at
least in part on a determination regarding a throughput or energy
efficiency if the second cell is added.
[0039] In some aspects, allocation of the power for the second cell
further comprises configuring an antenna module associated with the
first RAT to decrease power allocated for the first RAT.
[0040] In some aspects, the method includes throttling an uplink
transmission on the first RAT based at least in part on the
identification of the power management level.
[0041] In some aspects, the second cell is to be added as a primary
secondary cell of the dual-connectivity communication.
[0042] In some aspects, a UE for wireless communication includes a
memory; and one or more processors coupled to the memory, the
memory and the one or more processors configured to: identify,
while camped on a first cell associated with a first RAT, a power
management level for a communication using a second RAT, wherein
the power management level indicates an available power for the
communication using the second RAT, and wherein the available power
is based at least in part on an exposure rate or an absorption
rate; and delay a transmission of a measurement report on the first
cell based at least in part on the identification of the power
management level.
[0043] In some aspects, the power management level fails to satisfy
a threshold, and the transmission is delayed based at least in part
on the power management level failing to satisfy the threshold.
[0044] In some aspects, the threshold is associated with a
communication type of the communication using the second RAT.
[0045] In some aspects, the threshold is associated with
maintaining a minimum target data rate associated with the second
RAT.
[0046] In some aspects, the communication using the second RAT is a
RACH communication.
[0047] In some aspects, the communication using the second RAT is
associated with an uplink shared channel or an uplink control
channel.
[0048] In some aspects, the available power is a residual available
power after power has been allocated for a communication using the
first RAT.
[0049] In some aspects, the one or more processors are further
configured to: determine that a threshold associated with the power
management level is satisfied; and resume transmission of the
measurement report based at least in part on the threshold being
satisfied.
[0050] In some aspects, the one or more processors are further
configured to determine that the measurement report is associated
with a particular frequency, wherein the power management level is
based at least in part on the measurement report being associated
with the particular frequency.
[0051] In some aspects, the identification of the power management
level is based at least in part on whether the particular frequency
associated with the measurement report is associated with a
dual-connectivity cell addition or a handover or redirection to a
standalone cell.
[0052] In some aspects, the one or more processors are further
configured to determine whether the particular frequency is
associated with the dual-connectivity cell addition or the handover
or redirection to the standalone cell based at least in part on the
particular frequency being a millimeter wave frequency and the UE
not supporting a millimeter wave primary cell.
[0053] In some aspects, the one or more processors are further
configured to determine whether the particular frequency is
associated with the dual-connectivity cell addition or the handover
or redirection to the standalone cell based at least in part on the
particular frequency being in a frequency range that the UE does
not support for a primary cell.
[0054] In some aspects, the one or more processors are further
configured to determine whether the particular frequency is
associated with the dual-connectivity cell addition or the handover
or redirection to the standalone cell based at least in part on
whether the measurement report is associated with a location where
a standalone mode associated with the second RAT is not
deployed.
[0055] In some aspects, the one or more processors are further
configured to determine whether the particular frequency is
associated with the dual-connectivity cell addition or the handover
or redirection to the standalone cell based at least in part on
whether the UE has received information indicating that the
particular frequency can be used for a standalone cell or a
secondary cell group.
[0056] In some aspects, the transmission of the measurement report
is delayed with regard to a frequency for which the power
management level is identified.
[0057] In some aspects, measurement reporting is not delayed with
regard to a frequency for which the power management level is not
identified.
[0058] In some aspects, the one or more processors are further
configured to reject a blind secondary cell group addition
associated with a cell based at least in part on the power
management level being identified for the cell.
[0059] In some aspects, the power management level is associated
with a handover of the UE to the second RAT, and the measurement
report is associated with a measurement configured on a frequency
associated with the second RAT.
[0060] In some aspects, the power management level is based at
least in part on historical information associated with a cell.
[0061] In some aspects, the power management level is based at
least in part on motion information determined by the UE.
[0062] In some aspects, the first RAT is a Long Term Evolution
RAT.
[0063] In some aspects, the first RAT is a New Radio RAT in a
Frequency Range 1.
[0064] In some aspects, the first RAT is a New Radio RAT in a
Frequency Range 2.
[0065] In some aspects, the second RAT is a Long Term Evolution
RAT.
[0066] In some aspects, the second RAT is a New Radio RAT in a
Frequency Range 1.
[0067] In some aspects, the second RAT is a New Radio RAT in a
Frequency Range 2.
[0068] In some aspects, the one or more processors are further
configured to transmit information indicating whether the UE
supports the second RAT.
[0069] In some aspects, the information indicating whether the UE
supports the second RAT is transmitted as a fail reason in a
message rejecting a blind secondary cell group addition associated
with a cell.
[0070] In some aspects, a UE for wireless communication includes a
memory and one or more processors coupled to the memory, the memory
and the one or more processors configured to: identify, while
connected to a first cell associated with a first RAT, a second
cell, associated with a second RAT, for dual-connectivity
communication or a handover; identify a power management level for
the second cell, wherein the power management level is based at
least in part on a compliance power budget of the UE; and allocate
a power for the second cell based at least in part on the
identified power management level.
[0071] In some aspects, the power management level is based at
least in part on a determination that decreasing power allocated
for the first RAT will not cause radio link failure on the first
cell.
[0072] In some aspects, the power management level is based at
least in part on a determination that a measurement on the second
cell is within a threshold of a measurement reporting criterion, or
that the measurement on the second cell satisfies the measurement
reporting criterion and a time to trigger the handover or a cell
addition has started.
[0073] In some aspects, the power management level is based at
least in part on a determination, before the compliance power
budget is modified, that the second cell would not have adequate
power to complete a communication.
[0074] In some aspects, the power management level is based at
least in part on a determination regarding a throughput or energy
efficiency if the second cell is added.
[0075] In some aspects, the one or more processors, when allocating
the power for the second cell, are configured to configure an
antenna module associated with the first RAT to decrease power
allocated for the first RAT.
[0076] In some aspects, the one or more processors are further
configured to throttle an uplink transmission on the first RAT
based at least in part on the identification of the power
management level.
[0077] In some aspects, the second cell is to be added as a primary
secondary cell of the dual-connectivity communication.
[0078] In some aspects, a non-transitory computer-readable medium
storing a set of instructions for wireless communication includes
one or more instructions that, when executed by one or more
processors of a UE, cause the UE to: identify, while camped on a
first cell associated with a first RAT, a power management level
for a communication using a second RAT, wherein the power
management level indicates an available power for the communication
using the second RAT, and wherein the available power is based at
least in part on an exposure rate or an absorption rate; and delay
a transmission of a measurement report on the first cell based at
least in part on the identification of the power management
level.
[0079] In some aspects, the power management level fails to satisfy
a threshold, and the transmission is delayed based at least in part
on the power management level failing to satisfy the threshold.
[0080] In some aspects, the threshold is associated with a
communication type of the communication using the second RAT.
[0081] In some aspects, the threshold is associated with
maintaining a minimum target data rate associated with the second
RAT.
[0082] In some aspects, the communication using the second RAT is a
RACH communication.
[0083] In some aspects, the communication using the second RAT is
associated with an uplink shared channel or an uplink control
channel.
[0084] In some aspects, the available power is a residual available
power after power has been allocated for a communication using the
first RAT.
[0085] In some aspects, the one or more instructions further cause
the UE to determine that a threshold associated with the power
management level is satisfied; and resume transmission of the
measurement report based at least in part on the threshold being
satisfied.
[0086] In some aspects, the one or more instructions further cause
the UE to: determine that the measurement report is associated with
a particular frequency, wherein the power management level is based
at least in part on the measurement report being associated with
the particular frequency.
[0087] In some aspects, the identification of the power management
level is based at least in part on whether the particular frequency
associated with the measurement report is associated with a
dual-connectivity cell addition or a handover or redirection to a
standalone cell.
[0088] In some aspects, the one or more instructions further cause
the UE to determine whether the particular frequency is associated
with the dual-connectivity cell addition or the handover or
redirection to the standalone cell based at least in part on the
particular frequency being a millimeter wave frequency and the UE
not supporting a millimeter wave primary cell.
[0089] In some aspects, the one or more instructions further cause
the UE to determine whether the particular frequency is associated
with the dual-connectivity cell addition or the handover or
redirection to the standalone cell based at least in part on the
particular frequency being in a frequency range that the UE does
not support for a primary cell.
[0090] In some aspects, the one or more instructions further cause
the UE to determine whether the particular frequency is associated
with the dual-connectivity cell addition or the handover or
redirection to the standalone cell based at least in part on
whether the measurement report is associated with a location where
a standalone mode associated with the second RAT is not
deployed.
[0091] In some aspects, the one or more instructions further cause
the UE to determine whether the particular frequency is associated
with the dual-connectivity cell addition or the handover or
redirection to the standalone cell based at least in part on
whether the UE has received information indicating that the
particular frequency can be used for a standalone cell or a
secondary cell group.
[0092] In some aspects, the transmission of the measurement report
is delayed with regard to a frequency for which the power
management level is identified.
[0093] In some aspects, measurement reporting is not delayed with
regard to a frequency for which the power management level is not
identified.
[0094] In some aspects, the one or more instructions further cause
the UE to reject a blind secondary cell group addition associated
with a cell based at least in part on the power management level
being identified for the cell.
[0095] In some aspects, the power management level is associated
with a handover of the UE to the second RAT, and the measurement
report is associated with a measurement configured on a frequency
associated with the second RAT.
[0096] In some aspects, the power management level is based at
least in part on historical information associated with a cell.
[0097] In some aspects, the power management level is based at
least in part on motion information determined by the UE.
[0098] In some aspects, the first RAT is a Long Term Evolution
RAT.
[0099] In some aspects, the first RAT is a New Radio RAT in a
Frequency Range 1.
[0100] In some aspects, the first RAT is a New Radio RAT in a
Frequency Range 2.
[0101] In some aspects, the second RAT is a Long Term Evolution
RAT.
[0102] In some aspects, the second RAT is a New Radio RAT in a
Frequency Range 1.
[0103] In some aspects, the second RAT is a New Radio RAT in a
Frequency Range 2.
[0104] In some aspects, the one or more instructions further cause
the UE to transmit information indicating whether the UE supports
the second RAT.
[0105] In some aspects, the information indicating whether the UE
supports the second RAT is transmitted as a fail reason in a
message rejecting a blind secondary cell group addition associated
with a cell.
[0106] In some aspects, a non-transitory computer-readable medium
storing a set of instructions for wireless communication includes
one or more instructions that, when executed by one or more
processors of a UE, cause the UE to: identify, while connected to a
first cell associated with a first RAT, a second cell, associated
with a second RAT, for dual-connectivity communication or a
handover; identify a power management level for the second cell,
wherein the power management level is based at least in part on a
compliance power budget of the UE; and allocate a power for the
second cell based at least in part on the identified power
management level.
[0107] In some aspects, the power management level is based at
least in part on a determination that decreasing power allocated
for the first RAT will not cause radio link failure on the first
cell.
[0108] In some aspects, the power management level is based at
least in part on a determination that a measurement on the second
cell is within a threshold of a measurement reporting criterion, or
that the measurement on the second cell satisfies the measurement
reporting criterion and a time to trigger the handover or a cell
addition has started.
[0109] In some aspects, the power management level is based at
least in part on a determination, before the compliance power
budget is modified, that the second cell would not have adequate
power to complete a communication.
[0110] In some aspects, the power management level is based at
least in part on a determination regarding a throughput or energy
efficiency if the second cell is added.
[0111] In some aspects, the one or more instructions, that cause
the UE to allocate the power for the second cell, cause the UE to
configure an antenna module associated with the first RAT to
decrease power allocated for the first RAT.
[0112] In some aspects, the one or more instructions further cause
the UE to throttle an uplink transmission on the first RAT based at
least in part on the identification of the power management
level.
[0113] In some aspects, the second cell is to be added as a primary
secondary cell of the dual-connectivity communication.
[0114] In some aspects, an apparatus for wireless communication
includes means for identifying, while camped on a first cell
associated with a first RAT, a power management level for a
communication using a second RAT, wherein the power management
level indicates an available power for the communication using the
second RAT, and wherein the available power is based at least in
part on an exposure rate or an absorption rate; and means for
delaying a transmission of a measurement report on the first cell
based at least in part on the identification of the power
management level.
[0115] In some aspects, the power management level fails to satisfy
a threshold, and the transmission is delayed based at least in part
on the power management level failing to satisfy the threshold.
[0116] In some aspects, the threshold is associated with a
communication type of the communication using the second RAT.
[0117] In some aspects, the threshold is associated with
maintaining a minimum target data rate associated with the second
RAT.
[0118] In some aspects, the communication using the second RAT is a
RACH communication.
[0119] In some aspects, the communication using the second RAT is
associated with an uplink shared channel or an uplink control
channel.
[0120] In some aspects, the available power is a residual available
power after power has been allocated for a communication using the
first RAT.
[0121] In some aspects, the apparatus includes means for
determining that a threshold associated with the power management
level is satisfied; and means for resuming transmission of the
measurement report based at least in part on the threshold being
satisfied.
[0122] In some aspects, the apparatus includes means for
determining that the measurement report is associated with a
particular frequency, wherein the power management level is based
at least in part on the measurement report being associated with
the particular frequency.
[0123] In some aspects, the identification of the power management
level is based at least in part on whether the particular frequency
associated with the measurement report is associated with a
dual-connectivity cell addition or a handover or redirection to a
standalone cell.
[0124] In some aspects, the apparatus includes means for
determining whether the particular frequency is associated with the
dual-connectivity cell addition or the handover or redirection to
the standalone cell based at least in part on the particular
frequency being a millimeter wave frequency and the apparatus not
supporting a millimeter wave primary cell.
[0125] In some aspects, the apparatus includes means for
determining whether the particular frequency is associated with the
dual-connectivity cell addition or the handover or redirection to
the standalone cell based at least in part on the particular
frequency being in a frequency range that the apparatus does not
support for a primary cell.
[0126] In some aspects, the apparatus includes means for
determining whether the particular frequency is associated with the
dual-connectivity cell addition or the handover or redirection to
the standalone cell based at least in part on whether the
measurement report is associated with a location where a standalone
mode associated with the second RAT is not deployed.
[0127] In some aspects, the apparatus includes means for
determining whether the particular frequency is associated with the
dual-connectivity cell addition or the handover or redirection to
the standalone cell based at least in part on whether the apparatus
has received information indicating that the particular frequency
can be used for a standalone cell or a secondary cell group.
[0128] In some aspects, the transmission of the measurement report
is delayed with regard to a frequency for which the power
management level is identified.
[0129] In some aspects, measurement reporting is not delayed with
regard to a frequency for which the power management level is not
identified.
[0130] In some aspects, the apparatus includes means for rejecting
a blind secondary cell group addition associated with a cell based
at least in part on the power management level being identified for
the cell.
[0131] In some aspects, the power management level is associated
with a handover of the apparatus to the second RAT, and the
measurement report is associated with a measurement configured on a
frequency associated with the second RAT.
[0132] In some aspects, the power management level is based at
least in part on historical information associated with a cell.
[0133] In some aspects, the power management level is based at
least in part on motion information determined by the
apparatus.
[0134] In some aspects, the first RAT is a Long Term Evolution
RAT.
[0135] In some aspects, the first RAT is a New Radio RAT in a
Frequency Range 1.
[0136] In some aspects, the first RAT is a New Radio RAT in a
Frequency Range 2.
[0137] In some aspects, the second RAT is a Long Term Evolution
RAT.
[0138] In some aspects, the second RAT is a New Radio RAT in a
Frequency Range 1.
[0139] In some aspects, the second RAT is a New Radio RAT in a
Frequency Range 2.
[0140] In some aspects, the apparatus includes means for
transmitting information indicating whether the apparatus supports
the second RAT.
[0141] In some aspects, the information indicating whether the
apparatus supports the second RAT is transmitted as a fail reason
in a message rejecting a blind secondary cell group addition
associated with a cell.
[0142] In some aspects, an apparatus for wireless communication
includes means for identifying, while connected to a first cell
associated with a first RAT, a second cell, associated with a
second RAT, for dual-connectivity communication or a handover;
means for identifying a power management level for the second cell,
wherein the power management level is based at least in part on a
compliance power budget of the apparatus; and means for allocating
a power for the second cell based at least in part on the
identified power management level.
[0143] In some aspects, the power management level is based at
least in part on a determination that decreasing power allocated
for the first RAT will not cause radio link failure on the first
cell.
[0144] In some aspects, the power management level is based at
least in part on a determination that a measurement on the second
cell is within a threshold of a measurement reporting criterion, or
that the measurement on the second cell satisfies the measurement
reporting criterion and a time to trigger the handover or a cell
addition has started.
[0145] In some aspects, the power management level is based at
least in part on a determination, before the compliance power
budget is modified, that the second cell would not have adequate
power to complete a communication.
[0146] In some aspects, the power management level is based at
least in part on a determination regarding a throughput or energy
efficiency if the second cell is added.
[0147] In some aspects, the means for allocation of the power for
the second cell further comprises means for configuring an antenna
module associated with the first RAT to decrease power allocated
for the first RAT.
[0148] In some aspects, the apparatus includes means for throttling
an uplink transmission on the first RAT based at least in part on
the identification of the power management level.
[0149] In some aspects, the second cell is to be added as a primary
secondary cell of the dual-connectivity communication.
[0150] Aspects generally include a method, apparatus, system,
computer program product, non-transitory computer-readable medium,
user equipment, base station, wireless communication device, and/or
processing system as substantially described herein with reference
to and as illustrated by the drawings and specification.
[0151] The foregoing has outlined rather broadly the features and
technical advantages of examples according to the disclosure in
order that the detailed description that follows may be better
understood. Additional features and advantages will be described
hereinafter. The conception and specific examples disclosed may be
readily utilized as a basis for modifying or designing other
structures for carrying out the same purposes of the present
disclosure. Such equivalent constructions do not depart from the
scope of the appended claims. Characteristics of the concepts
disclosed herein, both their organization and method of operation,
together with associated advantages will be better understood from
the following description when considered in connection with the
accompanying figures. Each of the figures is provided for the
purposes of illustration and description, and not as a definition
of the limits of the claims.
BRIEF DESCRIPTION OF THE DRAWINGS
[0152] So that the above-recited features of the present disclosure
can be understood in detail, a more particular description, briefly
summarized above, may be had by reference to aspects, some of which
are illustrated in the appended drawings. It is to be noted,
however, that the appended drawings illustrate only certain typical
aspects of this disclosure and are therefore not to be considered
limiting of its scope, for the description may admit to other
equally effective aspects. The same reference numbers in different
drawings may identify the same or similar elements.
[0153] FIG. 1 is a diagram illustrating an example of a wireless
network, in accordance with the present disclosure.
[0154] FIG. 2 is a diagram illustrating an example of a base
station in communication with a user equipment (UE) in a wireless
network, in accordance with the present disclosure.
[0155] FIG. 3 is a diagram illustrating an example of dual
connectivity, in accordance with the present disclosure.
[0156] FIG. 4 is a diagram illustrating an example of signaling
associated with delaying measurement reporting in a
power-constrained scenario, in accordance with the present
disclosure.
[0157] FIG. 5 is a diagram illustrating an example of rejecting a
blind primary secondary cell (PSCell) addition based at least in
part on a low exposure margin threshold, in accordance with the
present disclosure.
[0158] FIG. 6 is a diagram illustrating an example of reallocation
of transmit power for a prospective cell addition, in accordance
with the present disclosure.
[0159] FIGS. 7-8 are diagrams illustrating example processes in
accordance with the present disclosure.
[0160] FIGS. 9-10 are block diagrams of example apparatuses for
wireless communication, in accordance with the present
disclosure.
DETAILED DESCRIPTION
[0161] Various aspects of the disclosure are described more fully
hereinafter with reference to the accompanying drawings. This
disclosure may, however, be embodied in many different forms and
should not be construed as limited to any specific structure or
function presented throughout this disclosure. Rather, these
aspects are provided so that this disclosure will be thorough and
complete, and will fully convey the scope of the disclosure to
those skilled in the art. Based on the teachings herein one skilled
in the art should appreciate that the scope of the disclosure is
intended to cover any aspect of the disclosure disclosed herein,
whether implemented independently of or combined with any other
aspect of the disclosure. For example, an apparatus may be
implemented or a method may be practiced using any number of the
aspects set forth herein. In addition, the scope of the disclosure
is intended to cover such an apparatus or method which is practiced
using other structure, functionality, or structure and
functionality in addition to or other than the various aspects of
the disclosure set forth herein. It should be understood that any
aspect of the disclosure disclosed herein may be embodied by one or
more elements of a claim.
[0162] Several aspects of telecommunication systems will now be
presented with reference to various apparatuses and techniques.
These apparatuses and techniques will be described in the following
detailed description and illustrated in the accompanying drawings
by various blocks, modules, components, circuits, steps, processes,
algorithms, or the like (collectively referred to as "elements").
These elements may be implemented using hardware, software, or
combinations thereof. Whether such elements are implemented as
hardware or software depends upon the particular application and
design constraints imposed on the overall system.
[0163] It should be noted that while aspects may be described
herein using terminology commonly associated with a 5G or NR radio
access technology (RAT), aspects of the present disclosure can be
applied to other RATs, such as a 3G RAT, a 4G RAT, and/or a RAT
subsequent to 5G (e.g., 6G).
[0164] FIG. 1 is a diagram illustrating an example of a wireless
network 100, in accordance with the present disclosure. The
wireless network 100 may be or may include elements of a 5G (NR)
network and/or an LTE network, among other examples. The wireless
network 100 may include a number of base stations 110 (shown as BS
110a, BS 110b, BS 110c, and BS 110d) and other network entities. A
base station (BS) is an entity that communicates with user
equipment (UEs) and may also be referred to as an NR BS, a Node B,
a gNB, a 5G node B (NB), an access point, a transmit receive point
(TRP), or the like. Each BS may provide communication coverage for
a particular geographic area. In 3GPP, the term "cell" can refer to
a coverage area of a BS and/or a BS subsystem serving this coverage
area, depending on the context in which the term is used.
[0165] A BS may provide communication coverage for a macro cell, a
pico cell, a femto cell, and/or another type of cell. A macro cell
may cover a relatively large geographic area (e.g., several
kilometers in radius) and may allow unrestricted access by UEs with
service subscription. A pico cell may cover a relatively small
geographic area and may allow unrestricted access by UEs with
service subscription. A femto cell may cover a relatively small
geographic area (e.g., a home) and may allow restricted access by
UEs having association with the femto cell (e.g., UEs in a closed
subscriber group (CSG)). A BS for a macro cell may be referred to
as a macro BS. ABS for a pico cell may be referred to as a pico BS.
ABS for a femto cell may be referred to as a femto BS or a home BS.
In the example shown in FIG. 1, a BS 110a may be a macro BS for a
macro cell 102a, a BS 110b may be a pico BS for a pico cell 102b,
and a BS 110c may be a femto BS for a femto cell 102c. A BS may
support one or multiple (e.g., three) cells. The terms "eNB", "base
station", "NR BS", "gNB", "TRP", "AP", "node B", "5G NB", and
"cell" may be used interchangeably herein.
[0166] In some aspects, a cell may not necessarily be stationary,
and the geographic area of the cell may move according to the
location of a mobile BS. In some aspects, the BSs may be
interconnected to one another and/or to one or more other BSs or
network nodes (not shown) in the wireless network 100 through
various types of backhaul interfaces, such as a direct physical
connection or a virtual network, using any suitable transport
network.
[0167] Wireless network 100 may also include relay stations. A
relay station is an entity that can receive a transmission of data
from an upstream station (e.g., a BS or a UE) and send a
transmission of the data to a downstream station (e.g., a UE or a
BS). A relay station may also be a UE that can relay transmissions
for other UEs. In the example shown in FIG. 1, a relay BS 110d may
communicate with macro BS 110a and a UE 120d in order to facilitate
communication between BS 110a and UE 120d. A relay BS may also be
referred to as a relay station, a relay base station, a relay, or
the like.
[0168] Wireless network 100 may be a heterogeneous network that
includes BSs of different types, such as macro BSs, pico BSs, femto
BSs, relay BSs, or the like. These different types of BSs may have
different transmit power levels, different coverage areas, and
different impacts on interference in wireless network 100. For
example, macro BSs may have a high transmit power level (e.g., 5 to
40 watts) whereas pico BSs, femto BSs, and relay BSs may have lower
transmit power levels (e.g., 0.1 to 2 watts).
[0169] A network controller 130 may couple to a set of BSs and may
provide coordination and control for these BSs. Network controller
130 may communicate with the BSs via a backhaul. The BSs may also
communicate with one another, e.g., directly or indirectly via a
wireless or wireline backhaul.
[0170] UEs 120 (e.g., 120a, 120b, 120c) may be dispersed throughout
wireless network 100, and each UE may be stationary or mobile. A UE
may also be referred to as an access terminal, a terminal, a mobile
station, a subscriber unit, a station, or the like. A UE may be a
cellular phone (e.g., a smart phone), a personal digital assistant
(PDA), a wireless modem, a wireless communication device, a
handheld device, a laptop computer, a cordless phone, a wireless
local loop (WLL) station, a tablet, a camera, a gaming device, a
netbook, a smartbook, an ultrabook, a medical device or equipment,
biometric sensors/devices, wearable devices (smart watches, smart
clothing, smart glasses, smart wrist bands, smart jewelry (e.g.,
smart ring, smart bracelet)), an entertainment device (e.g., a
music or video device, or a satellite radio), a vehicular component
or sensor, smart meters/sensors, industrial manufacturing
equipment, a global positioning system device, or any other
suitable device that is configured to communicate via a wireless or
wired medium.
[0171] Some UEs may be considered machine-type communication (MTC)
or evolved or enhanced machine-type communication (eMTC) UEs. MTC
and eMTC UEs include, for example, robots, drones, remote devices,
sensors, meters, monitors, and/or location tags, that may
communicate with a base station, another device (e.g., remote
device), or some other entity. A wireless node may provide, for
example, connectivity for or to a network (e.g., a wide area
network such as Internet or a cellular network) via a wired or
wireless communication link. Some UEs may be considered
Internet-of-Things (IoT) devices, and/or may be implemented as
NB-IoT (narrowband internet of things) devices. Some UEs may be
considered a Customer Premises Equipment (CPE). UE 120 may be
included inside a housing that houses components of UE 120, such as
processor components and/or memory components. In some aspects, the
processor components and the memory components may be coupled
together. For example, the processor components (e.g., one or more
processors) and the memory components (e.g., a memory) may be
operatively coupled, communicatively coupled, electronically
coupled, and/or electrically coupled.
[0172] In general, any number of wireless networks may be deployed
in a given geographic area. Each wireless network may support a
particular RAT and may operate on one or more frequencies. A RAT
may also be referred to as a radio technology, an air interface, or
the like. A frequency may also be referred to as a carrier, a
frequency channel, or the like. Each frequency may support a single
RAT in a given geographic area in order to avoid interference
between wireless networks of different RATs. In some cases, NR or
5G RAT networks may be deployed.
[0173] In some aspects, two or more UEs 120 (e.g., shown as UE 120a
and UE 120e) may communicate directly using one or more sidelink
channels (e.g., without using a base station 110 as an intermediary
to communicate with one another). For example, the UEs 120 may
communicate using peer-to-peer (P2P) communications,
device-to-device (D2D) communications, a vehicle-to-everything
(V2X) protocol (e.g., which may include a vehicle-to-vehicle (V2V)
protocol or a vehicle-to-infrastructure (V2I) protocol), and/or a
mesh network. In this case, the UE 120 may perform scheduling
operations, resource selection operations, and/or other operations
described elsewhere herein as being performed by the base station
110.
[0174] Devices of wireless network 100 may communicate using the
electromagnetic spectrum, which may be subdivided based on
frequency or wavelength into various classes, bands, channels, or
the like. For example, devices of wireless network 100 may
communicate using an operating band having a first frequency range
(FR1), which may span from 410 MHz to 7.125 GHz, and/or may
communicate using an operating band having a second frequency range
(FR2), which may span from 24.25 GHz to 52.6 GHz. The frequencies
between FR1 and FR2 are sometimes referred to as mid-band
frequencies. Although a portion of FR1 is greater than 6 GHz, FR1
is often referred to as a "sub-6 GHz" band. Similarly, FR2 is often
referred to as a "millimeter wave" band despite being different
from the extremely high frequency (EHF) band (30 GHz-300 GHz) which
is identified by the International Telecommunications Union (ITU)
as a "millimeter wave" band. Thus, unless specifically stated
otherwise, it should be understood that the term "sub-6 GHz" or the
like, if used herein, may broadly represent frequencies less than 6
GHz, frequencies within FR1, and/or mid-band frequencies (e.g.,
greater than 7.125 GHz). Similarly, unless specifically stated
otherwise, it should be understood that the term "millimeter wave"
or the like, if used herein, may broadly represent frequencies
within the EHF band, frequencies within FR2, and/or mid-band
frequencies (e.g., less than 24.25 GHz). It is contemplated that
the frequencies included in FR1 and FR2 may be modified, and
techniques described herein are applicable to those modified
frequency ranges.
[0175] As indicated above, FIG. 1 is provided as an example. Other
examples may differ from what is described with regard to FIG.
1.
[0176] FIG. 2 is a diagram illustrating an example 200 of a base
station 110 in communication with a UE 120 in a wireless network
100, in accordance with the present disclosure. Base station 110
may be equipped with T antennas 234a through 234t, and UE 120 may
be equipped with R antennas 252a through 252r, where in general
T.gtoreq.1 and R.gtoreq.1.
[0177] At base station 110, a transmit processor 220 may receive
data from a data source 212 for one or more UEs, select one or more
modulation and coding schemes (MCS) for each UE based at least in
part on channel quality indicators (CQIs) received from the UE,
process (e.g., encode and modulate) the data for each UE based at
least in part on the MCS(s) selected for the UE, and provide data
symbols for all UEs. Transmit processor 220 may also process system
information (e.g., for semi-static resource partitioning
information (SRPI)) and control information (e.g., CQI requests,
grants, and/or upper layer signaling) and provide overhead symbols
and control symbols. Transmit processor 220 may also generate
reference symbols for reference signals (e.g., a cell-specific
reference signal (CRS) or a demodulation reference signal (DMRS))
and synchronization signals (e.g., a primary synchronization signal
(PSS) or a secondary synchronization signal (SSS)). A transmit (TX)
multiple-input multiple-output (MIMO) processor 230 may perform
spatial processing (e.g., precoding) on the data symbols, the
control symbols, the overhead symbols, and/or the reference
symbols, if applicable, and may provide T output symbol streams to
T modulators (MODs) 232a through 232t. Each modulator 232 may
process a respective output symbol stream (e.g., for OFDM) to
obtain an output sample stream. Each modulator 232 may further
process (e.g., convert to analog, amplify, filter, and upconvert)
the output sample stream to obtain a downlink signal. T downlink
signals from modulators 232a through 232t may be transmitted via T
antennas 234a through 234t, respectively.
[0178] At UE 120, antennas 252a through 252r may receive the
downlink signals from base station 110 and/or other base stations
and may provide received signals to demodulators (DEMODs) 254a
through 254r, respectively. Each demodulator 254 may condition
(e.g., filter, amplify, downconvert, and digitize) a received
signal to obtain input samples. Each demodulator 254 may further
process the input samples (e.g., for OFDM) to obtain received
symbols. A MIMO detector 256 may obtain received symbols from all R
demodulators 254a through 254r, perform MIMO detection on the
received symbols if applicable, and provide detected symbols. A
receive processor 258 may process (e.g., demodulate and decode) the
detected symbols, provide decoded data for UE 120 to a data sink
260, and provide decoded control information and system information
to a controller/processor 280. The term "controller/processor" may
refer to one or more controllers, one or more processors, or a
combination thereof. A channel processor may determine a reference
signal received power (RSRP) parameter, a received signal strength
indicator (RSSI) parameter, a reference signal received quality
(RSRQ) parameter, an/or a CQI parameter, among other examples. In
some aspects, one or more components of UE 120 may be included in a
housing 284.
[0179] Network controller 130 may include communication unit 294,
controller/processor 290, and memory 292. Network controller 130
may include, for example, one or more devices in a core network.
Network controller 130 may communicate with base station 110 via
communication unit 294.
[0180] Antennas (e.g., antennas 234a through 234t and/or antennas
252a through 252r) may include, or may be included within, one or
more antenna panels, antenna groups, sets of antenna elements,
and/or antenna arrays, among other examples. An antenna panel, an
antenna group, a set of antenna elements, and/or an antenna array
may include one or more antenna elements. An antenna panel, an
antenna group, a set of antenna elements, and/or an antenna array
may include a set of coplanar antenna elements and/or a set of
non-coplanar antenna elements. An antenna panel, an antenna group,
a set of antenna elements, and/or an antenna array may include
antenna elements within a single housing and/or antenna elements
within multiple housings. An antenna panel, an antenna group, a set
of antenna elements, and/or an antenna array may include one or
more antenna elements coupled to one or more transmission and/or
reception components, such as one or more components of FIG. 2.
[0181] On the uplink, at UE 120, a transmit processor 264 may
receive and process data from a data source 262 and control
information (e.g., for reports that include RSRP, RSSI, RSRQ,
and/or CQI) from controller/processor 280. Transmit processor 264
may also generate reference symbols for one or more reference
signals. The symbols from transmit processor 264 may be precoded by
a TX MIMO processor 266 if applicable, further processed by
modulators 254a through 254r (e.g., for DFT-s-OFDM or CP-OFDM), and
transmitted to base station 110. In some aspects, a modulator and a
demodulator (e.g., MOD/DEMOD 254) of the UE 120 may be included in
a modem of the UE 120. In some aspects, the UE 120 includes a
transceiver. The transceiver may include any combination of
antenna(s) 252, modulators and/or demodulators 254, MIMO detector
256, receive processor 258, transmit processor 264, and/or TX MIMO
processor 266. The transceiver may be used by a processor (e.g.,
controller/processor 280) and memory 282 to perform aspects of any
of the methods described herein.
[0182] At base station 110, the uplink signals from UE 120 and
other UEs may be received by antennas 234, processed by
demodulators 232, detected by a MIMO detector 236 if applicable,
and further processed by a receive processor 238 to obtain decoded
data and control information sent by UE 120. Receive processor 238
may provide the decoded data to a data sink 239 and the decoded
control information to controller/processor 240. Base station 110
may include communication unit 244 and communicate to network
controller 130 via communication unit 244. Base station 110 may
include a scheduler 246 to schedule UEs 120 for downlink and/or
uplink communications. In some aspects, a modulator and a
demodulator (e.g., MOD/DEMOD 232) of the base station 110 may be
included in a modem of the base station 110. In some aspects, the
base station 110 includes a transceiver. The transceiver may
include any combination of antenna(s) 234, modulators and/or
demodulators 232, MIMO detector 236, receive processor 238,
transmit processor 220, and/or TX MIMO processor 230. The
transceiver may be used by a processor (e.g., controller/processor
240) and memory 242 to perform aspects of any of the methods
described herein.
[0183] Controller/processor 240 of base station 110,
controller/processor 280 of UE 120, and/or any other component(s)
of FIG. 2 may perform one or more techniques associated with
measurement reporting and transmit power allocation in a
power-constrained environment, as described in more detail
elsewhere herein. For example, controller/processor 240 of base
station 110, controller/processor 280 of UE 120, and/or any other
component(s) of FIG. 2 may perform or direct operations of, for
example, process 700 of FIG. 7, process 800 of FIG. 8, and/or other
processes as described herein. Memories 242 and 282 may store data
and program codes for base station 110 and UE 120, respectively. In
some aspects, memory 242 and/or memory 282 may include a
non-transitory computer-readable medium storing one or more
instructions (e.g., code and/or program code) for wireless
communication. For example, the one or more instructions, when
executed (e.g., directly, or after compiling, converting, and/or
interpreting) by one or more processors of the base station 110
and/or the UE 120, may cause the one or more processors, the UE
120, and/or the base station 110 to perform or direct operations
of, for example, process 700 of FIG. 7, process 800 of FIG. 8,
and/or other processes as described herein. In some aspects,
executing instructions may include running the instructions,
converting the instructions, compiling the instructions, and/or
interpreting the instructions.
[0184] In some aspects, the UE includes means for identifying,
while camped on a first cell associated with a first RAT, a power
management level for a communication using a second RAT, wherein
the power management level indicates an available power for the
communication using the second RAT, and wherein the available power
is based at least in part on an exposure rate or an absorption
rate; and/or means for delaying a transmission of a measurement
report on the first cell based at least in part on the
identification of the power management level. The means for the UE
to perform operations described herein may include, for example,
antenna 252, demodulator 254, MIMO detector 256, receive processor
258, transmit processor 264, TX MIMO processor 266, modulator 254,
controller/processor 280, and/or memory 282.
[0185] In some aspects, the UE includes means for identifying,
while connected to a first cell associated with a first RAT, a
second cell, associated with a second RAT, for dual-connectivity
communication or a handover; means for identifying a power
management level for the second cell, wherein the power management
level is based at least in part on a compliance power budget of the
UE; and/or means for allocating a power for the second cell based
at least in part on the identified power management level. The
means for the UE to perform operations described herein may
include, for example, antenna 252, demodulator 254, MIMO detector
256, receive processor 258, transmit processor 264, TX MIMO
processor 266, modulator 254, controller/processor 280, and/or
memory 282.
[0186] As indicated above, FIG. 2 is provided as an example. Other
examples may differ from what is described with regard to FIG.
2.
[0187] A wireless communication device, such as a UE, may be
subject to certain limitations on transmit power of the wireless
communication device. For example, a regulatory body may impose
limits on exposure rate of a user of a UE, absorption rate of a
user of the UE, or the like, so that the user is not subjected to
untenable amounts of radiated power from the UE. One example of a
limit is defined by a specific absorption rate (SAR). SAR is a
measurement of the rate (e.g., amount per unit mass) at which radio
frequency (RF) electromagnetic field energy is absorbed by the
human body. The Federal Communications Commission (FCC) and other
regulatory entities have placed limitations on SAR, with which UEs
subject to these limitations must comply. Examples of such
limitations include 1.6 milliwatts per gram (mW/g) of human tissue
(as specified by the FCC) and 2.0 mW/g per 10-grams of human tissue
for the European Union (EU) and many other countries who follow the
International Commission for Non-Ionizing Radiation Protection
(ICNIRP). Another example of a limit is defined by a maximum
permissible exposure (MPE). "MPE" refers to the highest power or
power density (PD) (expressed in watts per square centimeter or
joules per square centimeter) allowed for the radiation source
(e.g., the UE) to be considered safe.
[0188] Some of these limitations may be associated with a
particular frequency band or RAT. For example, a UE may operate on
different frequency bands (e.g., millimeter wave bands, also
referred to as Frequency Range 2; sub-6 gigahertz bands, also
referred to as Frequency Range 1, or the like) and/or with
different RATs (e.g., LTE, NR, millimeter wave, sub-6, or the
like). The summation of concurrent transmission power across all
bands and all technologies for the UE may be mandated to be SAR or
MPE compliant. In particular, an equation of the following form may
be satisfied by the UE. The following equation may provide for the
UE to combine different exposure metrics, normalize the metrics
with their respective limits, and add them together:
i .di-elect cons. [ 100 .times. .times. kHz , .times. 10 .times.
.times. GHz ] .times. .times. SAR i SAR limit + i .di-elect cons. [
10 .times. GHz , .times. 300 .times. .times. GHz ] .times. PD i PD
limit .ltoreq. 1 , ##EQU00001##
where SAR.sub.i=the SAR exposure (in mW/g) measured from
transmitter "i" in frequency range [100 kHz,10 GHz],
SAR.sub.limit=the SAR limit (in mW/g) (regulatory requirement,
fixed across bands), PD.sub.i=the power density (in W/cm.sup.2 or
J/cm.sup.2) from transmitter "i" in frequency range (10 GHz, 300
GHz], PD.sub.limit=the power density limit (in W/cm.sup.2 or
J/cm.sup.2). If the equation above is violated (i.e., if the
determined sum is greater than 1), the UE may apply a backoff,
based at least in part on arbitration rules defined herein, so that
the UE is SAR/MPE compliant.
[0189] In some scenarios, a UE camped on a first RAT (e.g., a UE
with a primary cell connection via a base station using the first
RAT) and performing a communication via a second RAT, may allocate
available power of the UE for communications using the first RAT
and communications using the second RAT. Generally, the UE may
prioritize the first RAT over the second RAT, since the UE is
camped on the first RAT. For example, the UE may favor the first
RAT by providing the first RAT with a full compliance power budget
(e.g., a full power allocation) requested by the first RAT, and
allocating any residual compliance power budget (e.g., any residual
transmit power) to the second RAT. Generally, a compliance power
budget may indicate a transmit power allocation over a future time
horizon that each RAT used by a UE can utilize. However, in many
scenarios, the residual compliance power budget may not be adequate
for communications on the second RAT. For example, the residual
compliance power budget may not provide sufficient transmit power
for reliable random access channel (RACH) transmission in
association with adding a cell to a secondary cell group (SCG),
successful physical uplink control channel (PUCCH) transmission, or
successful physical uplink shared channel (PUSCH) transmission. An
unsuccessful RACH transmission, such as due to an insufficient
transmit power associated with a residual compliance power budget,
may lead to radio link failure (RLF) of the SCG, whereas an
unsuccessful PDCCH/PDSCH transmission may lead to release of the
SCG. Similar conditions can arise during handover (HO) between
different RATs of a dual-connectivity communication. Thus,
throughput is lowered. Furthermore, the above conditions can occur
cyclically, leading to lower throughput over a long time
period.
[0190] As a more particular example, a UE may be camped on an LTE
cell in a radio resource control (RRC) connected state. A base
station may configure the UE with one or more NR measurement
objects (MOs). A measurement object indicates a measurement to be
performed by a UE and conditions for transmitting a measurement
report based at least in part on the measurement. Often, a base
station may configure a UE with an NR MO to enable the UE to
identify a suitable NR cell, such as for a dual-connectivity
communication or a handover. More generally, MOs may be used to
perform radio resource management (RRM) of the UE. The UE on the
LTE RAT may be power-constrained due to SAR restrictions. The UE
may perform NR measurements in accordance with the NR MO(s) and may
transmit a measurement report associated with an NR cell based at
least in part on an event B1 or event B2 (e.g., conditions
indicating that the NR cell's measurement is greater than a
threshold) to the base station. The base station may add the NR
cell as a primary secondary cell (PSCell) (e.g., a primary cell of
a secondary cell group) and may configure the UE in a
dual-connectivity mode, such as an E-UTRA-NR dual connectivity
(ENDC) mode. In the ENDC mode, the UE may favor LTE (e.g., the RAT
of the UE's PCell or master cell group (MCG)) by giving LTE the
full needed compliance power budget. Thus, the residual compliance
power budget may be provided to NR. The compliance power budget may
map to a transmit power allocation over a future time horizon that
each technology (LTE, FR1, FR2, or the like) can use during this
time horizon.
[0191] However, the residual power allocation may not be adequate
for NR to either complete RACH successfully, or after a successful
NR RACH, to successfully transmit PUCCH/PUSCH channels. The former
can result in NR SCG RLF while the latter can result in the base
station releasing the NR SCG. The above process results in lower
throughput. Additionally, the above process can repeat itself
cyclically resulting in lower throughput for a long time period.
The same issue can occur during HOs between FR1 and FR2 of an ENDC
call when a UE moves between coverages between FR1 and FR2, and the
UE has restrictions from compliance power budgets on LTE/FR1 (e.g.,
SAR) and/or FR2 (e.g., MPE).
[0192] Some techniques and apparatuses described herein provide for
a UE to determine, while camped on a first RAT, a power management
level for a second RAT. For example, the power management level may
indicate an available power for a communication on the second RAT.
In some aspects, the power management level may be insufficient for
the communication on the second RAT. The UE may delay a
transmission of a measurement report on the second RAT based at
least in part on the power management level (e.g., based at least
in part on determining that the power management level is
insufficient for the communication on the second RAT). In some
aspects, the UE may identify a prospective addition of a cell
associated with a second RAT (e.g., NR), and may adjust a power
management level (e.g., a compliance power budget) for the cell
associated with the second RAT in order to facilitate communication
on the second RAT. Thus, the UE may improve throughput and reduce
the occurrence of RLF and connection release.
[0193] FIG. 3 is a diagram illustrating an example 300 of dual
connectivity, in accordance with the present disclosure. The
example shown in FIG. 3 is for an Evolved Universal Mobile
Telecommunications System Terrestrial Radio Access (E-UTRA)-NR dual
connectivity (ENDC) mode. In the ENDC mode, a UE 120 communicates
using an LTE RAT on a master cell group (MCG), and the UE 120
communicates using an NR RAT on a secondary cell group (SCG).
However, aspects described herein may apply to an ENDC mode (e.g.,
where the MCG is associated with an LTE RAT and the SCG is
associated with an NR RAT), an NR-E-UTRA dual connectivity (NEDC)
mode (e.g., where the MCG is associated with an NR RAT and the SCG
is associated with an LTE RAT), an NR dual connectivity (NRDC) mode
(e.g., where the MCG is associated with an NR RAT and the SCG is
also associated with the NR RAT, such as an FR1 RAT and an FR2
RAT), or another dual connectivity mode (e.g., (e.g., where the MCG
is associated with a first RAT and the SCG is associated with one
of the first RAT or a second RAT). The ENDC mode is sometimes
referred to as an NR or 5G non-standalone (NSA) mode. Thus, as used
herein, "dual connectivity mode" may refer to an ENDC mode, a NEDC
mode, an NRDC mode, and/or another type of dual connectivity
mode.
[0194] As shown in FIG. 3, a UE 120 may communicate with both an
eNB (e.g., a 4G base station 110) and a gNB (e.g., a 5G base
station 110), and the eNB and the gNB may communicate (e.g.,
directly or indirectly) with a 4G/LTE core network, shown as an
evolved packet core (EPC) that includes a mobility management
entity (MME), a packet data network gateway (PGW), a serving
gateway (SGW), and/or the like. In FIG. 3, the PGW and the SGW are
shown collectively as P/SGW. In some aspects, the eNB and the gNB
may be co-located at the same base station 110. In some aspects,
the eNB and the gNB may be included in different base stations 110
(e.g., may not be co-located).
[0195] As further shown in FIG. 3, in some aspects, a wireless
network that permits operation in a 5G NSA mode may permit such
operations using a master cell group (MCG) for a first RAT (e.g.,
an LTE RAT, a 4G RAT, and/or the like) and a secondary cell group
(SCG) for a second RAT (e.g., an NR RAT, a 5G RAT, and/or the
like). In this case, the UE 120 may communicate with the eNB via
the MCG, and may communicate with the gNB via the SCG. In some
aspects, the MCG may anchor a network connection between the UE 120
and the 4G/LTE core network (e.g., for mobility, coverage, control
plane information, and/or the like), and the SCG may be added as
additional carriers to increase throughput (e.g., for data traffic,
user plane information, and/or the like). In some aspects, the gNB
and the eNB may not transfer user plane information between one
another. In some aspects, a UE 120 operating in a dual connectivity
mode may be concurrently connected with an LTE base station 110
(e.g., an eNB) and an NR base station 110 (e.g., a gNB) (e.g., in
the case of ENDC or NEDC), or may be concurrently connected with
one or more base stations 110 that use the same RAT (e.g., in the
case of NRDC). In some aspects, the MCG may be associated with a
first frequency band (e.g., a sub-6 GHz band and/or an FR1 band)
and the SCG may be associated with a second frequency band (e.g., a
millimeter wave band and/or an FR2 band).
[0196] The UE 120 may communicate via the MCG and the SCG using one
or more radio bearers (e.g., data radio bearers (DRBs), signaling
radio bearers (SRBs), and/or the like). For example, the UE 120 may
transmit or receive data via the MCG and/or the SCG using one or
more DRBs. Similarly, the UE 120 may transmit or receive control
information (e.g., radio resource control (RRC) information,
measurement reports, and/or the like) using one or more SRBs. In
some aspects, a radio bearer may be dedicated to a specific cell
group (e.g., a radio bearer may be an MCG bearer, an SCG bearer,
and/or the like). In some aspects, a radio bearer may be a split
radio bearer. A split radio bearer may be split in the uplink
and/or in the downlink. For example, a DRB may be split on the
downlink (e.g., the UE 120 may receive downlink information for the
MCG or the SCG in the DRB) but not on the uplink (e.g., the uplink
may be non-split with a primary path to the MCG or the SCG, such
that the UE 120 transmits in the uplink only on the primary path).
In some aspects, a DRB may be split on the uplink with a primary
path to the MCG or the SCG. A DRB that is split in the uplink may
transmit data using the primary path until a size of an uplink
transmit buffer satisfies an uplink data split threshold. If the
uplink transmit buffer satisfies the uplink data split threshold,
the UE 120 may transmit data to the MCG or the SCG using the
DRB.
[0197] As indicated above, FIG. 3 is provided as an example. Other
examples may differ from what is described with respect to FIG.
3.
[0198] FIG. 4 is a diagram illustrating an example 400 of signaling
associated with delaying measurement reporting in a
power-constrained scenario, in accordance with the present
disclosure. As shown, FIG. 4 includes a BS 110 and various modules
of a UE 120. The modules include an anchor module, which is
associated with an LTE RAT or an FR1 RAT, an NR module, which may
be associated with an FR1 RAT or an FR2 RAT, and a power management
(PM) module. In some aspects, the anchor module may be associated
with a first protocol stack of the UE, and the NR module may be
associated with a second protocol stack of the UE, such as for
dual-connectivity communications or for a make-before-break
handover. In some aspects, the anchor module and the NR module may
be associated with a same protocol stack of the UE, such as for a
handover from a first RAT associated with the anchor module to a
second RAT associated with the NR module. Generally, the RAT
associated with the anchor module is referred to herein as a first
RAT and the RAT associated with the NR module is referred to herein
as a second RAT. An action described herein as performed by the UE
120 can be performed by any of the anchor module, the NR module, or
the power management module, unless specified otherwise. In some
aspects, as described with regard to FIGS. 6 and 10, the UE 120 may
include a measurement module, which may perform measurements based
at least in part on configured measurement objects, such as
described with regard to FIGS. 4-8.
[0199] As shown by reference number 405, the UE may determine a
first threshold and a second threshold, shown as a low exposure
margin threshold and a high exposure margin threshold. For example,
as shown by reference number 410, the anchor module may register
with the PM module to receive notifications regarding a first
threshold and a second threshold, shown as a low exposure margin
threshold and a high exposure margin threshold. In some aspects,
the low exposure margin threshold may be a threshold for an
available power for a communication using the second RAT. For
example, the available power may be based at least in part on an
exposure rate or an absorption rate, such as a SAR or an MPE. If an
available power for the second RAT fails to satisfy the first
threshold (for example, due to power of the UE 120 being
prioritized for the anchor module or the first RAT), then the UE
may determine that transmission of a measurement report on the
first RAT is to be delayed, as described elsewhere herein. For
example, the UE may identify a power management level for a
communication using the second RAT, where the power management
level indicates an available power (e.g., a residual available
power) for the communication using the second RAT. If the power
management level or the available power fails to satisfy the first
threshold, then the UE 120 may delay transmission of the
measurement report.
[0200] In some aspects, the power management level may be
associated with a residual available power for the second RAT. For
example, the power management level may indicate a residual
available power for a dual-connectivity communication (e.g., from
NR to ENDC) or for a handover (e.g., to an NR standalone (SA)
mode). In some aspects, the first threshold may be based at least
in part on whether residual available power of the UE 120 (e.g.,
after allocating power for the first RAT) is sufficient for at
least one of a successful RACH operation on the second RAT, PUCCH
or PUSCH link maintenance on the second RAT, maintaining a minimum
target uplink data rate on the second RAT, or the like.
[0201] In some aspects, the UE 120 may determine the first
threshold and/or the second threshold based at least in part on
historical data. For example, the UE 120 may use statistics such as
cell history data to refine an estimate of an appropriate uplink
power for the first threshold and/or the second threshold. For
instance, in a frequently dwelled cell location (e.g., home, work,
etc.), the UE 120 can determine, based at least in part on a prior
value determined under particular RF conditions on LTE and NR
measurements, the appropriate value for a compliance power budget,
and therefore the first threshold or the second threshold. In some
aspects, the UE 120 may determine the first threshold and/or the
second threshold based at least in part on motion input, such as
information indicating whether the UE 120 is stationary or mobile,
information from an inertial sensor of the UE 120, or the like.
[0202] As shown by reference number 415, the anchor module may
connect to the BS 110. For example, the UE 120 may establish a
connection with or camp on the BS 110 using the first RAT. The
connection may be via a primary cell (PCell) associated with the
first RAT, such as an LTE PCell.
[0203] As shown by reference number 420, the UE 120 (e.g., the
anchor module) may receive, from the BS 110, information indicating
one or more requested measurements. For example, the information
indicating the one or more requested measurements may include one
or more measurement objects. In some aspects, the one or more
measurements objects may indicate a frequency associated with the
second RAT. For example, the one or more measurement objects may
indicate that the UE 120 is to perform a measurement on the second
RAT, such as for the purpose of identifying a suitable cell
associated with the second RAT for a dual-connectivity
communication or identifying a suitable cell associated with the
second RAT for a handover in a standalone mode.
[0204] A measurement object may be associated with a measurement
frequency. In example 400, the measurement frequency may be
associated with an NR cell, though the measurement frequency can be
associated with any frequency associated with the second RAT. In
some aspects, the measurement frequency can be configured for a
prospective ENDC Addition (e.g., an FR2 measurement frequency, when
the UE 120 does not support an FR2 SA mode). In some aspects, the
measurement frequency can be configured for a prospective LTE to NR
packet-switched (PS) handover or redirection. In the case of the
handover or redirection, while the UE 120 switches from LTE to NR
and there is only one RAT performing transmission at any given
time, the UE 120 may still delay measurement event reporting (as
described in more detail below), as the UE 120 may already have
been compliance-budget-limited, and operation in an NR SA mode may
require higher compliance power budget to provide acceptable link
performance (e.g., such as in the case when NR has a higher
pathloss than LTE).
[0205] In some aspects, the UE 120 may determine whether a
measurement frequency, specified by an MO, is a frequency for ENDC
only (and not NR SA). For example, the UE 120 may determine that
the measurement frequency is for ENDC if the NR MO indicates a mmW
frequency and the UE 120 does not support mmW as an NR PCell (which
may be indicated in UE capability information). As another example,
the UE 120 may determine that the measurement frequency is for ENDC
if the NR MO indicates an FR1 frequency and the UE 120 does not an
FR1 band associated with the FR1 frequency as an NR PCell (which
may be indicated in UE capability information). As yet another
example, the UE 120 may determine that the measurement frequency is
for ENDC if the NR MO indicates the NR MO is configured in
association with a location (e.g., a public land mobile network
(PLMN), a mobile country code (MCC), a geo-location based location,
a tracking area, or a geographical area associated with a cell)
where NR SA mode is not deployed. This determination can be based
at least in part on pre-configuration, crowdsourcing, or the like.
As yet another example, the UE 120 may determine that the
measurement frequency is for ENDC if an NR MO is not received via a
system information block (e.g., SIB24 inter-routing area neighbor
on LTE, SIB4 in NR SA), and the BS 110 has not configured the
measurement frequency as an NR SA frequency in the location (e.g.,
within a time window such as a last X seconds), and has configured
the NR measurement frequency as a NR SCG. In some aspects, if an NR
MO is exclusively associated with event B2 measurement reporting
configuration, the NR MO may typically be used for inter-RAT HO or
redirection.
[0206] As shown by reference number 425, the PM module may provide,
to the anchor module, a notification that the available power for
the second RAT fails to satisfy the first threshold. For example,
the UE 120 may determine that the power management level fails to
satisfy the first threshold. While example 400 and other examples
herein are described using notification-based communication, these
examples can also be implemented using polling-based
communication.
[0207] In some aspects, the UE 120 may determine that the available
power for the second RAT fails to satisfy the first threshold based
at least in part on whether the addition of the second cell is
associated with a dual-connectivity communication or an SA mode.
For example, the dual-connectivity communication may be associated
with a different first threshold and/or a different second
threshold than the SA mode. In some aspects, the UE 120 may
determine whether a measurement frequency is associated with the
dual-connectivity or the SA mode, and may determine whether the
power management level fails to satisfy the first threshold based
at least in part on whether the measurement frequency is associated
with the dual-connectivity mode or the SA mode.
[0208] As shown by reference number 430, based at least in part on
determining that the available power for the second RAT fails to
satisfy the first threshold, the UE 120 (e.g., the anchor module)
may delay measurement reporting. For example, the UE 120 may pause
measurement reporting of measurements determined based at least in
part on the one or more measurement objects. By delaying
measurement reporting, the UE 120 may delay a handover or SCG
activation of a cell associated with the second RAT and indicated
by the measurement reporting. Thus, the UE 120 may reduce power
consumption on the second RAT and reduce the likelihood of SCG RLF
failure or detach due to a power-limited scenario. In some aspects,
the UE 120 may continue to perform measurements on one or more
frequencies indicated by one or more measurement objects, and may
report the measurements only after the measurement reporting is
unpaused or is no longer delayed.
[0209] In some aspects, the UE 120 may be configured with multiple
measurement frequencies. In this case, the UE 120 may delay
measurement reporting with regard to measurement frequencies
associated with power management levels that fail to satisfy the
first threshold. For example, the UE 120 may not delay measurement
reporting with regard to a measurement frequency associated with a
power management level that satisfies the first threshold. Thus,
the UE 120 may increase throughput relative to indiscriminately
suspending measurement reporting.
[0210] In some aspects, the UE 120 may delay measurement reporting
based at least in part on the UE 120 being in a dual-connectivity
mode and being configured for a handover from an initial second RAT
to a target second RAT. For example, the UE 120 may delay the
measurement reporting based at least in part on the UE 120 being in
an LTE+FR1 ENDC mode, and being configured with NR FR1 and FR2
measurement objects (e.g., to support an NR handover such as from
FR1 to FR2 in ENDC, or vice versa), or vice versa. For example, for
an LTE to NR handover, the UE 120 may delay event B1/B2 measurement
reporting. In an ENDC mode, an NRDC mode, or the like, the UE 120
may also delay NR A3/A4/A5 measurement reporting. The content of
these measurement reports, and the corresponding measurement
objects, is defined in 3GPP specifications.
[0211] As shown by reference number 435, the PM module may provide
a notification, to the anchor module, indicating that the high
exposure margin threshold is satisfied. The high exposure margin
threshold may be a second threshold, which can be the same as the
first threshold or different than the first threshold. In some
aspects, the high exposure margin threshold may be a threshold for
an available power for a communication using the second RAT. If an
available power for the second RAT satisfies the first threshold,
for example due to the available power for the second RAT being
sufficient for a communication on the second RAT, then the UE may
determine that transmission of a measurement report on the first
RAT is to be resumed (e.g., performed without delay). For example,
the UE 120 may identify a power management level for a
communication using the second RAT, where the power management
level indicates an available power (e.g., a residual available
power) for the communication using the second RAT. If the power
management level or the available power satisfies the second
threshold, then the UE 120 may transmit the measurement report.
Thus, the UE 120 may trigger the establishment of the
dual-connectivity communication or the handover based at least in
part on residual available power for the communication using the
second RAT being sufficient for the communication using the second
RAT.
[0212] As shown by reference number 440, the anchor module may
resume measurement reporting associated with the second RAT (e.g.,
NR measurement reporting) on the first RAT (e.g., the PCell) based
at least in part on the notification regarding the high exposure
margin threshold. Therefore, as shown by reference number 445, the
anchor module (e.g., the UE 120) may transmit the measurement
report using the first RAT. For example, the UE 120 may transmit
the measurement report on an LTE cell, such as a PCell. The
transmission of the measurement report may trigger a
dual-connectivity communication or a handover of the UE 120, as
described in more detail below.
[0213] As shown by reference number 450, the BS 110 may transmit,
to the UE 120, a configuration message. For example, the
configuration message may indicate a configuration (e.g., a
reconfiguration) to add a cell, associated with the second RAT, as
a PSCell for a dual-connectivity communication. The configuration
message may be based at least in part on the measurement reporting
performed at reference number 445. As shown by reference number
455, the anchor module and the NR module may perform a PSCell
attach procedure with regard to the PSCell associated with the
second RAT based at least in part on the configuration message.
Thus, the UE 120 may delay the addition of the cell associated with
the second RAT until power conditions at the UE 120 are not so
limited as to hamper operation on the second RAT.
[0214] As indicated above, FIG. 4 is provided as an example. Other
examples may differ from what is described with regard to FIG.
4.
[0215] FIG. 5 is a diagram illustrating an example 500 of rejecting
a blind PSCell addition based at least in part on a low exposure
margin threshold, in accordance with the present disclosure. As
shown, example 500 includes a BS 110 and a UE 120. As further
shown, the UE 120 is associated with an anchor module, an NR
module, and a PM module, which are each described in more detail in
connection with FIG. 4.
[0216] As shown by reference number 505, the UE 120 may optionally
experience SCG failure of a cell associated with a second RAT
(e.g., NR). This may be due to a power management level associated
with the cell associated with the second RAT (e.g., an available
power for a communication using the second RAT) being insufficient
for communication via the cell associated with the second RAT. As
shown by reference number 510, the PM module may provide, to the
anchor module, a notification that a low exposure margin threshold
is not satisfied. For example, the notification may indicate that
available power for the communication on the second RAT fails to
satisfy a first threshold, as described in more detail in
connection with FIG. 4, above.
[0217] As shown by reference number 515, the anchor module may
pause (e.g., delay transmission of) measurement reporting on the
first RAT. As further shown, the anchor module may continue
activity on the first RAT (e.g., the LTE RAT). As shown by
reference number 520, the UE 120 (e.g., the anchor module) may
receive, from the BS 110, a blind PSCell addition message. A blind
PSCell addition message may be transmitted by a BS 110, and may
trigger the UE 120 to add a cell (e.g., a PSCell) to an SCG. A
blind PSCell addition message may differ from the configuration
message shown in FIG. 4 because the blind PSCell addition message
may not be triggered by measurement reporting, whereas the
configuration message shown in FIG. 4 may be triggered by
measurement reporting. In some aspects, the blind PSCell addition
message may be referred to as a blind secondary cell group
addition.
[0218] As shown by reference number 525, the UE 120 (e.g., the
anchor module) may transmit an SCG failure message to the BS 110
based at least in part on the blind PSCell addition message. For
example, the UE 120 may transmit the SCG failure message based at
least in part on the determination that the power management level
fails to satisfy the low exposure margin threshold. As another
example, the UE 120 may transmit the SCG failure message based at
least in part on the UE 120 having paused or delayed measurement
reporting based at least in part on the notification shown by
reference number 510. In some aspects, the SCG failure message may
indicate a fail reason. A fail reason may identify a cause or
reason associated with failure to add a cell to the SCG. In some
aspects, the fail reason may indicate whether the UE supports a RAT
associated with the cell. Thus, the UE 120 may prevent the BS 110
from blindly adding a cell on the second RAT to an SCG of the UE
120 when the UE 120 is in a power-constrained scenario, such as
when the power management level fails to satisfy the low exposure
margin threshold. For example, the UE 120 may transmit a message
rejecting a blind secondary cell group addition associated with a
cell.
[0219] As shown by reference number 530, the PM module may provide
a notification, to the anchor module, that the high exposure margin
threshold is satisfied (e.g., that the second threshold is
satisfied), as described in more detail in connection with FIG. 4.
Accordingly, as shown by reference number 535, the anchor module
may resume measurement reporting associated with the second RAT,
and may allow the BS 110 to perform blind PSCell addition with
regard to the second RAT. In other words, if the UE 120 receives a
blind PSCell addition message while the power management level
satisfies the high exposure margin threshold, then the UE 120 may
perform the blind PSCell addition in accordance with the blind
PSCell addition message.
[0220] As indicated above, FIG. 5 is provided as an example. Other
examples may differ from what is described with regard to FIG.
5.
[0221] FIG. 6 is a diagram illustrating an example 600 of
reallocation of transmit power for a prospective cell addition, in
accordance with the present disclosure. As shown, example 500
includes a BS 110 and a UE 120. As further shown, the UE 120 is
associated with an anchor module, an NR module, and a PM module,
which are each described in more detail in connection with FIGS. 4
and 5. Furthermore, the UE 120 is associated with a measurement
(Meas.) module. The measurement module may determine measurements
based at least in part on one or more measurement objects received
from the BS 110 (not shown in FIG. 6). For example, the measurement
module may be capable of performing measurements on a first RAT
(e.g., associated with the anchor module) and on a second RAT
(e.g., associated with the NR module).
[0222] As shown in FIG. 6, and by reference number 610, the UE 120
(e.g., the anchor module) may receive, from a BS 110 and from a
first cell associated with the first RAT, a connection
reconfiguration message. More generally, the UE 120 may receive a
configuration message. The connection reconfiguration message may
indicate a second cell, associated with a second RAT, for
dual-connectivity communication or a handover or redirection from
the first cell to the second cell. For example, the connection
reconfiguration message may indicate that the UE 120 is to add the
second cell as a cell of an SCG, such as a PSCell. As another
example, the connection reconfiguration message may indicate that
the UE 120 is to perform a handover (e.g., be handed over) or
redirection from the first cell to the second cell. In some
aspects, the connection reconfiguration message may be based at
least in part on measurement information, such as measurement
information determined by the measurement module and/or reported by
the UE 120. In some aspects, the connection reconfiguration message
may be a blind connection reconfiguration message, such as
associated with a blind SCG addition. Thus, the connection
reconfiguration message may identify a prospective cell associated
with the second RAT.
[0223] In some aspects, the UE 120 may perform the operations
described with regard to FIG. 6 while the UE 120 has a single
active RAT. For example, the UE 120 may reduce a compliance power
budget on the single active RAT (e.g., the first RAT) to facilitate
addition of a second cell. In some aspects, the second cell is
associated with the single active RAT. In some aspects, the second
cell is associated with a different RAT. In the case of the single
active RAT, in some aspects, the UE 120 may not receive a
configuration message. For example, the UE may identify, while
connected to a first cell associated with a first RAT, a second
cell, associated with a second RAT, for dual-connectivity
communication or handover.
[0224] As shown by reference number 620, the measurement module may
provide, to the PM module, an indication that a measurement on the
second cell (e.g., associated with a measurement frequency of the
second cell) is within a threshold of a reporting criterion. For
example, the indication may indicate that the measurement on the
second cell is within K1 dB of the reporting criterion, wherein K1
is a number. As another example, the indication may indicate that
the measurement on the second cell satisfies the reporting
criterion (indicating that handover or addition of the second cell
is imminent).
[0225] As shown by reference number 630, the PM module (or another
module of the UE 120, such as the measurement module) may determine
that reducing an LTE transmit power (e.g., reducing a power
management level of the first RAT) will not result in RLF on the
first RAT. For example, the PM module may determine that the first
RAT is associated with sufficient power to maintain a link with the
BS 110 even if the power allocated to the first RAT is reduced.
[0226] As shown by reference number 640, the PM module (or another
module of the UE 120, such as the measurement module) may determine
that a low exposure margin threshold is not satisfied for the
second RAT. For example, the PM module may identify a power
management level of the second RAT, and may determine that the
power management level is associated with a power allocation that
fails to satisfy the low exposure margin threshold. Thus, the PM
module may determine that, if a current power allocation of the UE
120 is used for the second cell, RLF is likely to occur with regard
to RACH, a PUCCH/PUSCH transmission, or the like, on the second
cell. This determination is described in more detail in connection
with FIG. 4.
[0227] In some aspects, the PM module may determine that the
cell(s) associated with the second RAT will not have adequate power
to complete a successful RACH procedure. In some aspects, the PM
module may determine that the cell(s) associated with the second
RAT do not have adequate power for PUCCH/PUSCH link maintenance. In
some aspects, the PM module may determine that the cell(s)
associated with the second RAT do not have adequate power to
satisfy a minimum target uplink data rate. In some aspects, the PM
module may determine that adding the cell(s) associated with the
second RAT for a dual-connectivity communication will result in
higher uplink throughput and/or improved energy efficiency compared
to the first RAT's leg of the dual-connectivity communication.
[0228] As shown by reference number 650, the PM module may cause
the anchor module to decrease a power allocation on the first RAT
based at least in part on one or more of the conditions described
with regard to reference numbers 620, 630, and 640 being satisfied.
For example, the PM module may reconfigure an antenna module
associated with the anchor module to decrease a transmit power
allocated for the first RAT. As another example, the PM module may
cause the UE 120 to flow control uplink transmissions (e.g., to
throttle uplink transmissions, to decrease a data rate of uplink
transmissions, to decrease a transmit power of uplink
transmissions, or the like), which may reduce power consumption
associated with the first RAT. As shown by reference number 660,
the PM module may increase a power allocation for the second RAT
based at least in part on one or more of the conditions described
with regard to reference numbers 620, 630, and 640 being satisfied.
In some aspects, the PM module may increase the power allocation
for the second RAT based at least in part on the power allocation
for the first RAT being decreased. For example, the power
allocation for the second RAT may be a residual power allocation
after power is allocated for the first RAT (and may thus be
increased as the power allocated for the first RAT is decreased).
As shown by reference number 670, the UE 120 may add the second
cell (e.g., may transition to ENDC mode). In some aspects, the UE
may perform a handover from the first cell to the second cell.
Thus, the UE 120 may improve throughput on the second RAT and
reduce the likelihood of RLF or link release on the second RAT.
[0229] As indicated above, FIG. 6 is provided as an example. Other
examples may differ from what is described with regard to FIG.
6.
[0230] FIG. 7 is a diagram illustrating an example process 700
performed, for example, by a UE, in accordance with the present
disclosure. Example process 700 is an example where the UE (e.g.,
UE 120) performs operations associated with techniques for
measurement reporting and transmit power allocation in a
power-constrained environment.
[0231] As shown in FIG. 7, in some aspects, process 700 may include
identifying, while camped on a first cell associated with a first
RAT, a power management level for a communication using a second
RAT, wherein the power management level indicates an available
power for the communication using the second RAT, and wherein the
available power is based at least in part on an exposure rate or an
absorption rate (block 710). For example, the UE (e.g., using PM
component 908, depicted in FIG. 9) may identify, while camped on a
first cell associated with a first RAT, a power management level
for a communication using a second RAT, wherein the power
management level indicates an available power for the communication
using the second RAT, and wherein the available power is based at
least in part on an exposure rate or an absorption rate, as
described above.
[0232] As further shown in FIG. 7, in some aspects, process 700 may
include delaying a transmission of a measurement report on the
first cell based at least in part on the identification of the
power management level (block 720). For example, the UE (e.g.,
using anchor component 910, depicted in FIG. 9) may delay a
transmission of a measurement report on the first cell based at
least in part on the identification of the power management level,
as described above.
[0233] Process 700 may include additional aspects, such as any
single aspect or any combination of aspects described below and/or
in connection with one or more other processes described elsewhere
herein.
[0234] In a first aspect, the power management level fails to
satisfy a threshold, and the transmission is delayed based at least
in part on the power management level failing to satisfy the
threshold.
[0235] In a second aspect, alone or in combination with the first
aspect, the threshold is associated with a communication type of
the communication using the second RAT.
[0236] In a third aspect, alone or in combination with one or more
of the first and second aspects, the threshold is associated with
maintaining a minimum target data rate associated with the second
RAT.
[0237] In a fourth aspect, alone or in combination with one or more
of the first through third aspects, the communication using the
second RAT is a random access channel (RACH) communication.
[0238] In a fifth aspect, alone or in combination with one or more
of the first through fourth aspects, the communication using the
second RAT is associated with an uplink shared channel or an uplink
control channel.
[0239] In a sixth aspect, alone or in combination with one or more
of the first through fifth aspects, the available power is a
residual available power after power has been allocated for a
communication using the first RAT.
[0240] In a seventh aspect, alone or in combination with one or
more of the first through sixth aspects, process 700 includes
determining that a threshold associated with the power management
level is satisfied, and resuming transmission of the measurement
report based at least in part on the threshold being satisfied.
[0241] In an eighth aspect, alone or in combination with one or
more of the first through seventh aspects, process 700 includes
determining that the measurement report is associated with a
particular frequency, wherein the power management level is based
at least in part on the measurement report being associated with
the particular frequency.
[0242] In a ninth aspect, alone or in combination with one or more
of the first through eighth aspects, the identification of the
power management level is based at least in part on whether the
particular frequency associated with the measurement report is
associated with a dual-connectivity cell addition or a handover or
redirection to a standalone cell.
[0243] In a tenth aspect, alone or in combination with one or more
of the first through ninth aspects, process 700 includes
determining whether the particular frequency is associated with the
dual-connectivity cell addition or the handover or redirection to
the standalone cell based at least in part on the particular
frequency being in a frequency range that the UE does not support
for a primary cell.
[0244] In an eleventh aspect, alone or in combination with one or
more of the first through tenth aspects, the frequency range is a
millimeter wave frequency range.
[0245] In a twelfth aspect, alone or in combination with one or
more of the first through eleventh aspects, process 700 includes
determining whether the particular frequency is associated with the
dual-connectivity cell addition or the handover or redirection to
the standalone cell based at least in part on whether the
measurement report is associated with a location where a standalone
mode associated with the second RAT is not deployed.
[0246] In a thirteenth aspect, alone or in combination with one or
more of the first through twelfth aspects, process 700 includes
determining whether the particular frequency is associated with the
dual-connectivity cell addition or the handover or redirection to
the standalone cell based at least in part on whether the UE has
received information indicating that the particular frequency can
be used for a standalone cell or a secondary cell group.
[0247] In a fourteenth aspect, alone or in combination with one or
more of the first through thirteenth aspects, the transmission of
the measurement report is delayed with regard to a frequency for
which the power management level is identified.
[0248] In a fifteenth aspect, alone or in combination with one or
more of the first through fourteenth aspects, measurement reporting
is not delayed with regard to a frequency for which the power
management level is not identified.
[0249] In a sixteenth aspect, alone or in combination with one or
more of the first through fifteenth aspects, process 700 includes
rejecting a blind secondary cell group addition associated with a
cell based at least in part on the power management level being
identified for the cell.
[0250] In a seventeenth aspect, alone or in combination with one or
more of the first through sixteenth aspects, the power management
level is associated with a handover of the UE to the second RAT,
and the measurement report is associated with a measurement
configured on a frequency associated with the second RAT.
[0251] In an eighteenth aspect, alone or in combination with one or
more of the first through seventeenth aspects, the power management
level is based at least in part on historical information
associated with a cell.
[0252] In a nineteenth aspect, alone or in combination with one or
more of the first through eighteenth aspects, the power management
level is based at least in part on motion information determined by
the UE.
[0253] In a twentieth aspect, alone or in combination with one or
more of the first through nineteenth aspects, the first RAT is a
Long Term Evolution RAT.
[0254] In a twenty-first aspect, alone or in combination with one
or more of the first through twentieth aspects, the first RAT is a
New Radio RAT in a Frequency Range 1.
[0255] In a twenty-second aspect, alone or in combination with one
or more of the first through twenty-first aspects, the first RAT is
a New Radio RAT in a Frequency Range 2.
[0256] In a twenty-third aspect, alone or in combination with one
or more of the first through twenty-second aspects, the second RAT
is a Long Term Evolution RAT.
[0257] In a twenty-fourth aspect, alone or in combination with one
or more of the first through twenty-third aspects, the second RAT
is a New Radio RAT in a Frequency Range 1.
[0258] In a twenty-fifth aspect, alone or in combination with one
or more of the first through twenty-fourth aspects, the second RAT
is a New Radio RAT in a Frequency Range 2.
[0259] In a twenty-sixth aspect, alone or in combination with one
or more of the first through twenty-fifth aspects, process 700
includes transmitting information indicating whether the UE
supports the second RAT.
[0260] In a twenty-seventh aspect, alone or in combination with one
or more of the first through twenty-sixth aspects, the information
indicating whether the UE supports the second RAT is transmitted as
a fail reason in a message rejecting a blind secondary cell group
addition associated with a cell.
[0261] Although FIG. 7 shows example blocks of process 700, in some
aspects, process 700 may include additional blocks, fewer blocks,
different blocks, or differently arranged blocks than those
depicted in FIG. 7. Additionally, or alternatively, two or more of
the blocks of process 700 may be performed in parallel.
[0262] FIG. 8 is a diagram illustrating an example process 800
performed, for example, by a UE, in accordance with the present
disclosure. Example process 800 is an example where the UE (e.g.,
UE 120) performs operations associated with techniques for
measurement reporting and transmit power allocation in
power-constrained environment.
[0263] As shown in FIG. 8, in some aspects, process 800 may include
identifying, while connected to a first cell associated with a
first RAT, a second cell, associated with a second RAT, for
dual-connectivity communication or a handover (block 810). For
example, the UE (e.g., using anchor component 1010, depicted in
FIG. 10) may identify, while connected to a first cell associated
with a first RAT, a second cell, associated with a second RAT, for
dual-connectivity communication or a handover, as described
above.
[0264] As further shown in FIG. 8, in some aspects, process 800 may
include identifying a power management level for the second cell,
wherein the power management level is based at least in part on a
compliance power budget of the UE (block 820). For example, the UE
(e.g., using PM component 1008, depicted in FIG. 10) may identify a
power management level for the second cell, wherein the power
management level is based at least in part on a compliance power
budget of the UE, as described above.
[0265] As further shown in FIG. 8, in some aspects, process 800 may
include allocating a power for the second cell based at least in
part on the identified power management level (block 830). For
example, the UE (e.g., using PM component 1008, depicted in FIG.
10) may allocate a power for the second cell based at least in part
on the identified power management level, as described above.
[0266] Process 800 may include additional aspects, such as any
single aspect or any combination of aspects described below and/or
in connection with one or more other processes described elsewhere
herein.
[0267] In a first aspect, the power management level is based at
least in part on a determination that decreasing power allocated
for the first RAT will not cause radio link failure on the first
cell.
[0268] In a second aspect, alone or in combination with the first
aspect, the power management level is based at least in part on a
determination that a measurement on the second cell is within a
threshold of a measurement reporting criterion, or that the
measurement on the second cell satisfies the measurement reporting
criterion and a time to trigger the handover or a cell addition has
started.
[0269] In a third aspect, alone or in combination with one or more
of the first and second aspects, the power management level is
based at least in part on a determination, before the compliance
power budget is modified, that the second cell would not have
adequate power to complete a communication.
[0270] In a fourth aspect, alone or in combination with one or more
of the first through third aspects, the power management level is
based at least in part on a determination regarding a throughput or
energy efficiency if the second cell is added.
[0271] In a fifth aspect, alone or in combination with one or more
of the first through fourth aspects, allocating the power for the
second cell further comprises configuring an antenna module
associated with the first RAT to decrease power allocated for the
first RAT.
[0272] In a sixth aspect, alone or in combination with one or more
of the first through fifth aspects, process 800 includes throttling
an uplink transmission on the first RAT based at least in part on
the identification of the power management level.
[0273] In a seventh aspect, alone or in combination with one or
more of the first through sixth aspects, the second cell is to be
added as a primary secondary cell of the dual-connectivity
communication.
[0274] Although FIG. 8 shows example blocks of process 800, in some
aspects, process 800 may include additional blocks, fewer blocks,
different blocks, or differently arranged blocks than those
depicted in FIG. 8. Additionally, or alternatively, two or more of
the blocks of process 800 may be performed in parallel.
[0275] FIG. 9 is a block diagram of an example apparatus 900 for
wireless communication. The apparatus 900 may be a UE, or a UE may
include the apparatus 900. In some aspects, the apparatus 900
includes a reception component 902 and a transmission component
904, which may be in communication with one another (for example,
via one or more buses and/or one or more other components). As
shown, the apparatus 900 may communicate with another apparatus 906
(such as a UE, a base station, or another wireless communication
device) using the reception component 902 and the transmission
component 904. As further shown, the apparatus 900 may include one
or more of a PM component 908, an anchor component 910, a
non-anchor component 912, and a measurement component 914, among
other examples.
[0276] The PM component 908 may include or be the PM module of
FIGS. 4-6, and may include controller/processor 280, transmit
processor 264, TX MIMO processor 266, MOD 254, antenna 252, DEMOD
254, MIMO detector 256, receive processor 258, and/or the like. The
anchor component 910 may include or be the anchor module of FIGS.
4-6, and may include controller/processor 280, transmit processor
264, TX MIMO processor 266, MOD 254, antenna 252, DEMOD 254, MIMO
detector 256, receive processor 258, and/or the like. The
non-anchor component 912 may include or be the NR module of FIGS.
4-6, and may include controller/processor 280, transmit processor
264, TX MIMO processor 266, MOD 254, antenna 252, DEMOD 254, MIMO
detector 256, receive processor 258, and/or the like. The
measurement component 914 may include or be the measurement module
of FIG. 6, and may include controller/processor 280, transmit
processor 264, TX MIMO processor 266, MOD 254, antenna 252, DEMOD
254, MIMO detector 256, receive processor 258, and/or the like.
[0277] In some aspects, the apparatus 900 may be configured to
perform one or more operations described herein in connection with
FIGS. 3-6. Additionally or alternatively, the apparatus 900 may be
configured to perform one or more processes described herein, such
as process 700 of FIG. 7. In some aspects, the apparatus 900 and/or
one or more components shown in FIG. 9 may include one or more
components of the UE described above in connection with FIG. 2.
Additionally, or alternatively, one or more components shown in
FIG. 9 may be implemented within one or more components described
above in connection with FIG. 2. Additionally or alternatively, one
or more components of the set of components may be implemented at
least in part as software stored in a memory. For example, a
component (or a portion of a component) may be implemented as
instructions or code stored in a non-transitory computer-readable
medium and executable by a controller or a processor to perform the
functions or operations of the component.
[0278] The reception component 902 may receive communications, such
as reference signals, control information, data communications, or
a combination thereof, from the apparatus 906. The reception
component 902 may provide received communications to one or more
other components of the apparatus 900. In some aspects, the
reception component 902 may perform signal processing on the
received communications (such as filtering, amplification,
demodulation, analog-to-digital conversion, demultiplexing,
deinterleaving, de-mapping, equalization, interference
cancellation, or decoding, among other examples), and may provide
the processed signals to the one or more other components of the
apparatus 906. In some aspects, the reception component 902 may
include one or more antennas, a demodulator, a MIMO detector, a
receive processor, a controller/processor, a memory, or a
combination thereof, of the UE described above in connection with
FIG. 2.
[0279] The transmission component 904 may transmit communications,
such as reference signals, control information, data
communications, or a combination thereof, to the apparatus 906. In
some aspects, one or more other components of the apparatus 906 may
generate communications and may provide the generated
communications to the transmission component 904 for transmission
to the apparatus 906. In some aspects, the transmission component
904 may perform signal processing on the generated communications
(such as filtering, amplification, modulation, digital-to-analog
conversion, multiplexing, interleaving, mapping, or encoding, among
other examples), and may transmit the processed signals to the
apparatus 906. In some aspects, the transmission component 904 may
include one or more antennas, a modulator, a transmit MIMO
processor, a transmit processor, a controller/processor, a memory,
or a combination thereof, of the UE described above in connection
with FIG. 2. In some aspects, the transmission component 904 may be
co-located with the reception component 902 in a transceiver.
[0280] The PM component 908 may identify, while camped on a first
cell associated with a first RAT, a power management level for a
communication using a second RAT, wherein the power management
level indicates an available power for the communication using the
second RAT, and wherein the available power is based at least in
part on an exposure rate or an absorption rate. The PM component
908 or the anchor component 910 may delay a transmission of a
measurement report on the first cell based at least in part on the
identification of the power management level.
[0281] The PM component 908 may determine that a threshold
associated with the power management level is satisfied.
[0282] The anchor component 910 or the PM component 908 may resume
transmission of the measurement report based at least in part on
the threshold being satisfied.
[0283] The PM component 908 or the measurement component 914 may
determine that the measurement report is associated with a
particular frequency, wherein the power management level is based
at least in part on the measurement report being associated with
the particular frequency.
[0284] The PM component 908 or the measurement component 914 may
determine whether the particular frequency is associated with the
dual-connectivity cell addition or the handover or redirection to
the standalone cell based at least in part on the particular
frequency being a millimeter wave frequency and the UE not
supporting a millimeter wave primary cell.
[0285] The PM component 908 or the measurement component 914 may
determine whether the particular frequency is associated with the
dual-connectivity cell addition or the handover or redirection to
the standalone cell based at least in part on the particular
frequency being in a frequency range that the UE does not support
for a primary cell.
[0286] The PM component 908 or the measurement component 914 may
determine whether the particular frequency is associated with the
dual-connectivity cell addition or the handover or redirection to
the standalone cell based at least in part on whether the
measurement report is associated with a location where a standalone
mode associated with the second RAT is not deployed.
[0287] The PM component 908 or the measurement component 914 may
determine whether the particular frequency is associated with the
dual-connectivity cell addition or the handover or redirection to
the standalone cell based at least in part on whether the UE has
received information indicating that the particular frequency can
be used for a standalone cell or a secondary cell group.
[0288] The anchor component 910 or the PM component 908 may reject
a blind secondary cell group addition associated with a cell based
at least in part on the power management level being identified for
the cell.
[0289] The transmission component 904 may transmit information
indicating whether the UE supports the second RAT.
[0290] The number and arrangement of components shown in FIG. 9 are
provided as an example. In practice, there may be additional
components, fewer components, different components, or differently
arranged components than those shown in FIG. 9. Furthermore, two or
more components shown in FIG. 9 may be implemented within a single
component, or a single component shown in FIG. 9 may be implemented
as multiple, distributed components. Additionally or alternatively,
a set of (one or more) components shown in FIG. 9 may perform one
or more functions described as being performed by another set of
components shown in FIG. 9.
[0291] FIG. 10 is a block diagram of an example apparatus 1000 for
wireless communication. The apparatus 1000 may be a UE, or a UE may
include the apparatus 1000. In some aspects, the apparatus 1000
includes a reception component 1002 and a transmission component
1004, which may be in communication with one another (for example,
via one or more buses and/or one or more other components). As
shown, the apparatus 1000 may communicate with another apparatus
1006 (such as a UE, a base station, or another wireless
communication device) using the reception component 1002 and the
transmission component 1004. As further shown, the apparatus 1000
may include one or more of a PM component 1008, an anchor component
1010, a non-anchor component 1012, and a measurement component
1014, among other examples.
[0292] The PM component 1008 may include or be the PM module of
FIGS. 4-6, and may include controller/processor 280, transmit
processor 264, TX MIMO processor 266, MOD 254, antenna 252, DEMOD
254, MIMO detector 256, receive processor 258, and/or the like. The
anchor component 1010 may include or be the anchor module of FIGS.
4-6, and may include controller/processor 280, transmit processor
264, TX MIMO processor 266, MOD 254, antenna 252, DEMOD 254, MIMO
detector 256, receive processor 258, and/or the like. The
non-anchor component 1012 may include or be the NR module of FIGS.
4-6, and may include controller/processor 280, transmit processor
264, TX MIMO processor 266, MOD 254, antenna 252, DEMOD 254, MIMO
detector 256, receive processor 258, and/or the like. The
measurement component 1014 may include or be the measurement module
of FIG. 6, and may include controller/processor 280, transmit
processor 264, TX MIMO processor 266, MOD 254, antenna 252, DEMOD
254, MIMO detector 256, receive processor 258, and/or the like.
[0293] In some aspects, the apparatus 1000 may be configured to
perform one or more operations described herein in connection with
FIGS. 3-6. Additionally or alternatively, the apparatus 1000 may be
configured to perform one or more processes described herein, such
as process 800 of FIG. 8. In some aspects, the apparatus 1000
and/or one or more components shown in FIG. 10 may include one or
more components of the UE described above in connection with FIG.
2. Additionally, or alternatively, one or more components shown in
FIG. 10 may be implemented within one or more components described
above in connection with FIG. 2. Additionally or alternatively, one
or more components of the set of components may be implemented at
least in part as software stored in a memory. For example, a
component (or a portion of a component) may be implemented as
instructions or code stored in a non-transitory computer-readable
medium and executable by a controller or a processor to perform the
functions or operations of the component.
[0294] The reception component 1002 may receive communications,
such as reference signals, control information, data
communications, or a combination thereof, from the apparatus 1006.
The reception component 1002 may provide received communications to
one or more other components of the apparatus 1000. In some
aspects, the reception component 1002 may perform signal processing
on the received communications (such as filtering, amplification,
demodulation, analog-to-digital conversion, demultiplexing,
deinterleaving, de-mapping, equalization, interference
cancellation, or decoding, among other examples), and may provide
the processed signals to the one or more other components of the
apparatus 1006. In some aspects, the reception component 1002 may
include one or more antennas, a demodulator, a MIMO detector, a
receive processor, a controller/processor, a memory, or a
combination thereof, of the UE described above in connection with
FIG. 2.
[0295] The transmission component 1004 may transmit communications,
such as reference signals, control information, data
communications, or a combination thereof, to the apparatus 1006. In
some aspects, one or more other components of the apparatus 1006
may generate communications and may provide the generated
communications to the transmission component 1004 for transmission
to the apparatus 1006. In some aspects, the transmission component
1004 may perform signal processing on the generated communications
(such as filtering, amplification, modulation, digital-to-analog
conversion, multiplexing, interleaving, mapping, or encoding, among
other examples), and may transmit the processed signals to the
apparatus 1006. In some aspects, the transmission component 1004
may include one or more antennas, a modulator, a transmit MIMO
processor, a transmit processor, a controller/processor, a memory,
or a combination thereof, of the UE described above in connection
with FIG. 2. In some aspects, the transmission component 1004 may
be co-located with the reception component 1002 in a
transceiver.
[0296] The reception component 1002 or the PM component 1008 may
identify, while connected to a first cell associated with a first
RAT, a second cell, associated with a second RAT, for
dual-connectivity communication or a handover. The PM component
1008 or the measurement component 1014 may identify a power
management level for the second cell, wherein the power management
level is based at least in part on a compliance power budget of the
UE. The PM component 1008 or the measurement component 1014 may
allocate a power for the second cell based at least in part on the
identified power management level.
[0297] The PM component 1008 or the anchor component 1010 may
throttle an uplink transmission on the first RAT based at least in
part on the identification of the power management level.
[0298] The number and arrangement of components shown in FIG. 10
are provided as an example. In practice, there may be additional
components, fewer components, different components, or differently
arranged components than those shown in FIG. 10. Furthermore, two
or more components shown in FIG. 10 may be implemented within a
single component, or a single component shown in FIG. 10 may be
implemented as multiple, distributed components. Additionally or
alternatively, a set of (one or more) components shown in FIG. 10
may perform one or more functions described as being performed by
another set of components shown in FIG. 10.
[0299] While the techniques and apparatuses described herein are
often described in the context of LTE to ENDC transitions, such as
where the first RAT is an LTE or FR1 RAT and the second RAT is an
NR RAT, the techniques and apparatuses described herein are
generalizable to any case where multiple links have configured
uplinks. Some examples include ENDC or next generation ENDC
(NG-ENDC) (e.g., LTE+FR1, LTE+FR2, LTE+FR1 to LTE+FR2 HO), NR-DC
(e.g., FR1+FR1, FR1+FR2, HO between these topologies), NEDC
topologies and similar HO between various sub-configurations in NE
DC, an NR SA mode (e.g., an LTE to FR1 HO, an LTE to FR2 HO, an FR1
to FR2 HO), an FR1 with no UL carrier aggregation (CA) to FR1 with
UL CA or FR1+FR2 UL CA, or an FR2 to FR2 UL CA+FR1 UL CA mode, a
dual connectivity mode wherein the uplink connection is time
division multiplexed between LTE and NR in ENDC, or the like.
[0300] The following provides an overview of some Aspects of the
present disclosure:
[0301] Aspect 1: A method of wireless communication performed by a
user equipment (UE), comprising: identifying, while camped on a
first cell associated with a first radio access technology (RAT), a
power management level for a communication using a second RAT,
wherein the power management level indicates an available power for
the communication using the second RAT, and wherein the available
power is based at least in part on an exposure rate or an
absorption rate; and delaying a transmission of a measurement
report on the first cell based at least in part on the
identification of the power management level.
[0302] Aspect 2: The method of Aspect 1, wherein the power
management level fails to satisfy a threshold, and wherein the
transmission is delayed based at least in part on the power
management level failing to satisfy the threshold.
[0303] Aspect 3: The method of Aspect 2, wherein the threshold is
associated with a communication type of the communication using the
second RAT.
[0304] Aspect 4: The method of Aspect 2, wherein the threshold is
associated with maintaining a minimum target data rate associated
with the second RAT.
[0305] Aspect 5: The method of Aspect 2, wherein the communication
using the second RAT is a random access channel (RACH)
communication.
[0306] Aspect 6: The method of Aspect 2, wherein the communication
using the second RAT is associated with an uplink shared channel or
an uplink control channel.
[0307] Aspect 7: The method of any of Aspects 1-6, wherein the
available power is a residual available power after power has been
allocated for a communication using the first RAT.
[0308] Aspect 8: The method of any of Aspects 1-7, further
comprising: determining that a threshold associated with the power
management level is satisfied; and resuming transmission of the
measurement report based at least in part on the threshold being
satisfied.
[0309] Aspect 9: The method of any of Aspects 1-8, further
comprising: determining that the measurement report is associated
with a particular frequency, wherein the power management level is
based at least in part on the measurement report being associated
with the particular frequency.
[0310] Aspect 10: The method of Aspect 9, wherein the
identification of the power management level is based at least in
part on whether the particular frequency associated with the
measurement report is associated with a dual-connectivity cell
addition or a handover or redirection to a standalone cell.
[0311] Aspect 11: The method of Aspect 10, further comprising:
determining whether the particular frequency is associated with the
dual-connectivity cell addition or the handover or redirection to
the standalone cell based at least in part on the particular
frequency being a millimeter wave frequency and the UE not
supporting a millimeter wave primary cell.
[0312] Aspect 12: The method of Aspect 10, further comprising:
determining whether the particular frequency is associated with the
dual-connectivity cell addition or the handover or redirection to
the standalone cell based at least in part on the particular
frequency being in a frequency range that the UE does not support
for a primary cell.
[0313] Aspect 13: The method of Aspect 10, further comprising:
determining whether the particular frequency is associated with the
dual-connectivity cell addition or the handover or redirection to
the standalone cell based at least in part on whether the
measurement report is associated with a location where a standalone
mode associated with the second RAT is not deployed.
[0314] Aspect 14: The method of Aspect 10, further comprising:
determining whether the particular frequency is associated with the
dual-connectivity cell addition or the handover or redirection to
the standalone cell based at least in part on whether the UE has
received information indicating that the particular frequency can
be used for a standalone cell or a secondary cell group.
[0315] Aspect 15: The method of any of Aspects 1-14, wherein the
transmission of the measurement report is delayed with regard to a
frequency for which the power management level is identified.
[0316] Aspect 16: The method of Aspect 15, wherein measurement
reporting is not delayed with regard to a frequency for which the
power management level is not identified.
[0317] Aspect 17: The method of any of Aspects 1-16, further
comprising: rejecting a blind secondary cell group addition
associated with a cell based at least in part on the power
management level being identified for the cell.
[0318] Aspect 18: The method of any of Aspects 1-17, wherein the
power management level is associated with a handover of the UE to
the second RAT, and wherein the measurement report is associated
with a measurement configured on a frequency associated with the
second RAT.
[0319] Aspect 19: The method of any of Aspects 1-18, wherein the
power management level is based at least in part on historical
information associated with a cell.
[0320] Aspect 20: The method of any of Aspects 1-19, wherein the
power management level is based at least in part on motion
information determined by the UE.
[0321] Aspect 21: The method of any of Aspects 1-20, wherein the
first RAT is a Long Term Evolution RAT.
[0322] Aspect 22: The method of any of Aspects 1-21, wherein the
first RAT is a New Radio RAT in a Frequency Range 1.
[0323] Aspect 23: The method of any of Aspects 1-22, wherein the
first RAT is a New Radio RAT in a Frequency Range 2.
[0324] Aspect 24: The method of any of Aspects 1-23, wherein the
second RAT is a Long Term Evolution RAT.
[0325] Aspect 25: The method of any of Aspects 1-24, wherein the
second RAT is a New Radio RAT in a Frequency Range 1.
[0326] Aspect 26: The method of any of Aspects 1-25, wherein the
second RAT is a New Radio RAT in a Frequency Range 2.
[0327] Aspect 27: The method of any of Aspects 1-26, further
comprising: transmitting information indicating whether the UE
supports the second RAT.
[0328] Aspect 28: The method of Aspect 27, wherein the information
indicating whether the UE supports the second RAT is transmitted as
a fail reason in a message rejecting a blind secondary cell group
addition associated with a cell.
[0329] Aspect 29: A method of wireless communication performed by a
user equipment (UE), comprising: identifying, while connected to a
first cell associated with a first radio access technology (RAT), a
second cell, associated with a second RAT, for dual-connectivity
communication or a handover; identifying a power management level
for the second cell, wherein the power management level is based at
least in part on a compliance power budget of the UE; and
allocating, prior to adding the second cell, a power for the second
cell based at least in part on the identified power management
level.
[0330] Aspect 30: The method of Aspect 29, wherein the power
management level is based at least in part on a determination that
decreasing power allocated for the first RAT will not cause radio
link failure on the first cell.
[0331] Aspect 31: The method of any of Aspects 29-30, wherein the
power management level is based at least in part on a determination
that a measurement on the second cell is within a threshold of a
measurement reporting criterion, or that the measurement on the
second cell satisfies the measurement reporting criterion and a
time to trigger the handover or a cell addition has started.
[0332] Aspect 32: The method of any of Aspects 29-31, wherein the
power management level is based at least in part on a
determination, before the compliance power budget is modified, that
the second cell would not have adequate power to complete a
communication.
[0333] Aspect 33: The method of any of Aspects 29-32, wherein the
power management level is based at least in part on a determination
regarding a throughput or energy efficiency if the second cell is
added.
[0334] Aspect 34: The method of any of Aspects 29-33, wherein
allocation of the power for the second cell further comprises:
configuring an antenna module associated with the first RAT to
decrease power allocated for the first RAT.
[0335] Aspect 35: The method of any of Aspects 29-34, further
comprising: throttling an uplink transmission on the first RAT
based at least in part on the identification of the power
management level.
[0336] Aspect 36: The method of any of Aspects 29-35, wherein the
second cell is to be added as a primary secondary cell of the
dual-connectivity communication.
[0337] Aspect 37: The method of any of Aspects 29-36, wherein the
power management level is based at least in part a minimum uplink
data rate for a service associated with the first RAT.
[0338] Aspect 38: An apparatus for wireless communication at a
device, comprising a processor; memory coupled with the processor;
and instructions stored in the memory and executable by the
processor to cause the apparatus to perform the method of one or
more of Aspects 1-37.
[0339] Aspect 39: A device for wireless communication, comprising a
memory and one or more processors coupled to the memory, the one or
more processors configured to perform the method of one or more of
Aspects 1-37.
[0340] Aspect 40: An apparatus for wireless communication,
comprising at least one means for performing the method of one or
more of Aspects 1-37.
[0341] Aspect 41: A non-transitory computer-readable medium storing
code for wireless communication, the code comprising instructions
executable by a processor to perform the method of one or more of
Aspects 1-37.
[0342] Aspect 42: A non-transitory computer-readable medium storing
a set of instructions for wireless communication, the set of
instructions comprising one or more instructions that, when
executed by one or more processors of a device, cause the device to
perform the method of one or more of Aspects 1-37.
[0343] The foregoing disclosure provides illustration and
description, but is not intended to be exhaustive or to limit the
aspects to the precise forms disclosed. Modifications and
variations may be made in light of the above disclosure or may be
acquired from practice of the aspects.
[0344] As used herein, the term "component" is intended to be
broadly construed as hardware, firmware, and/or a combination of
hardware and software. As used herein, a processor is implemented
in hardware, firmware, and/or a combination of hardware and
software. It will be apparent that systems and/or methods described
herein may be implemented in different forms of hardware, firmware,
and/or a combination of hardware and software. The actual
specialized control hardware or software code used to implement
these systems and/or methods is not limiting of the aspects. Thus,
the operation and behavior of the systems and/or methods were
described herein without reference to specific software code--it
being understood that software and hardware can be designed to
implement the systems and/or methods based, at least in part, on
the description herein.
[0345] As used herein, satisfying a threshold may, depending on the
context, refer to a value being greater than the threshold, greater
than or equal to the threshold, less than the threshold, less than
or equal to the threshold, equal to the threshold, not equal to the
threshold, or the like.
[0346] Even though particular combinations of features are recited
in the claims and/or disclosed in the specification, these
combinations are not intended to limit the disclosure of various
aspects. In fact, many of these features may be combined in ways
not specifically recited in the claims and/or disclosed in the
specification. Although each dependent claim listed below may
directly depend on only one claim, the disclosure of various
aspects includes each dependent claim in combination with every
other claim in the claim set. As used herein, a phrase referring to
"at least one of" a list of items refers to any combination of
those items, including single members. As an example, "at least one
of: a, b, or c" is intended to cover a, b, c, a-b, a-c, b-c, and
a-b-c, as well as any combination with multiples of the same
element (e.g., a-a, a-a-a, a-a-b, a-a-c, a-b-b, a-c-c, b-b, b-b-b,
b-b-c, c-c, and c-c-c or any other ordering of a, b, and c).
[0347] No element, act, or instruction used herein should be
construed as critical or essential unless explicitly described as
such. Also, as used herein, the articles "a" and "an" are intended
to include one or more items and may be used interchangeably with
"one or more." Further, as used herein, the article "the" is
intended to include one or more items referenced in connection with
the article "the" and may be used interchangeably with "the one or
more." Furthermore, as used herein, the terms "set" and "group" are
intended to include one or more items (e.g., related items,
unrelated items, or a combination of related and unrelated items),
and may be used interchangeably with "one or more." Where only one
item is intended, the phrase "only one" or similar language is
used. Also, as used herein, the terms "has," "have," "having," or
the like are intended to be open-ended terms. Further, the phrase
"based on" is intended to mean "based, at least in part, on" unless
explicitly stated otherwise. Also, as used herein, the term "or" is
intended to be inclusive when used in a series and may be used
interchangeably with "and/or," unless explicitly stated otherwise
(e.g., if used in combination with "either" or "only one of").
* * * * *